HTCM-006 Maintenance Manual (2013)

 

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HTCM-006 Maintenance Manual (2013)

 

 

Helicopter
Technology
Company
Maintenance Manual
HTCM-006
Part Number 204P2100-101 and -103
Models UH-1H, UH-1B*, TH-1F, UH-1F, UH-1P, 204B, 205A, and 205A-1
MAIN ROTOR BLADE
(Installation and Maintenance)
* with STC # SR00026DE Installed
Initial Release Date:
12/17/2013
Revision
Change Letter:
D
Change D ate:
01/03/2020
D Added -103 Configuration
01/ 03/ 2020 GH B
C Added Applic. - TH-1F, UH-1F, UH-1P, 204B, 205A, 205A-1
05/ 12/ 2015 GH B
B Ad d ed Ap p licability - UH -1B w ith STC #SR00026DE Installed
04/ 10/ 2015 GH B
A Added Applicability - All FAA Certificated UH-1H
03/ 31/ 2014 GH B
N/ C Released
12/ 17/ 2013 GH B
Note
See Section “REFEREN CE DOCUMEN TS” below for ind icated references.
The most current revision of this document (HTCM-006) will be available
on the Helicopter Technology Company (HTC) website at
www.helicoptertech.com under Technical Publications.
12902 South Broadway • Los Angeles, California 90061
Sheet 1 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Table of Contents
LIST OF EFFECTIVE PAGES
20
PURPOSE
21
REFERENCE DOCUMENTS
23
DEFINITIONS AND ABBREVIATIONS
25
WEIGHT AND BALANCE
26
WARNINGS
27
INDEX
28
AIRWORTHINESS LIMITATIONS
29
Interchangeability and Life Limits
29
12902 South Broadway • Los Angeles, California 90061
Sheet 2 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
204P2100-101 AND -103 MAIN ROTOR BLADE ASSEMBLY: FOR UH-1H MODELS
(TM 55-1520-210-23-1) AND UH-1B MODELS WITH STC #SR00026DE INSTALLED
(TM 55-1520-210-23-1)
33
Chapter 1. Introduction
33
Section I. Servicing
33
1-7.
Main and Tail Rotor System
33
1-14.
Cleaning
33
1-15.
Description - Cleaning
33
1-15.
Rotor Blades - Cleaning
33
1-20.
Treatment of Aluminum and Magnesium Corrosion
33
1-21.
Snow and Ice Removal
34
1-22.
Consumable Maintenance Supplies and Materials
35
1-23.
Description - Consumable Maintenance Supplies and Materials
35
Table 1-1. Consumable Maintenance Supplies and Materials
35
1-24.
Special Tools and Test Equipment
35
1-25.
Description - Special Tools and Test Equipment
35
Table 1-2. Special Tools and Test Equipment
35
1-26.
Support Equipment
36
1-27.
Description - Support Equipment
36
Table 1-3. Support Equipment
36
1-28.
Standard Torque Procedures and Requirements
36
Table 1-4. Standard Torque Chart
36
1-29.
Reuse of Self-Locking Nuts
36
Table 1-7. Minimum Breakaway Torque
36
Section IV. Inspection Requirements
37
1-56.
General Information
37
1-57.
Standards of Serviceability
37
1-58.
Special Inspection
37
1-59.
Description - Special Inspection
37
1-60.
Definition and General Information - Special Inspection
37
1-61.
Requirements - Special Inspection
37
12902 South Broadway • Los Angeles, California 90061
Sheet 3 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Section V. Overhaul and Retirement Schedule
38
1-62.
Introduction
38
1-63.
Overhaul Interval
38
1-64.
Description - Overhaul Interval
38
1-65.
Retirement Schedule
38
1-66.
Description - Retirement Schedule
38
Table 1-8. Overhaul and Retirement Schedule
38
Section VI. Flight Safety Critical Aircraft Parts
39
1-67.
Flight Safety Critical Aircraft Parts
39
Table 1-9. Flight Safety Critical Aircraft Parts
39
Chapter 5. Rotors
40
Section I. Main Rotor System
40
5-1.
Main Rotor System
40
5-2.
Description - Main Rotor System
40
5-3.
Main Rotor Hub and Blade Assembly
40
5-4.
Description - Main Rotor Hub and Blade Assembly
40
5-5.
Cleaning - Main Rotor Hub and Blade Assembly
40
5-6.
Lubrication - Main Rotor Hub and Blade Assembly
40
5-7.
Alignment - Main Rotor Hub and Blade Assembly
40
5-8.
Adjustment, Collective Pitch Forces - Main Rotor Hub with Metal Blade Installed
41
5-9.
Operational Check - Main Rotor Hub and Blade Assembly
41
5-10.
Autorotation RPM Adjusting - Main Rotor Hub and Blade Assembly
41
5-11.
Troubleshooting - Main Rotor Hub and Blade Assembly
41
Table 5-1. Troubleshooting Main Rotor System
41
5-12.
Removal - Main Rotor Hub and Blade Assembly
41
5-13.
Installation - Main Rotor Hub and Blade Assembly
41
12902 South Broadway • Los Angeles, California 90061
Sheet 4 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Section III. Main Rotor Blades
42
5-27.
Main Rotor Blade
42
5-28.
Description - Main Rotor Blade
42
5-29.
Inspection - Main Rotor Blade (Installed)
42
Table 5-3. Inspection Requirements Main Rotor Blade
42
5-30.
Removal - Main Rotor Blade
42
5-31.
Inspection - Main Rotor Blade
43
Table 5-4. Main Rotor Blade - Repairable Nicks, Scratches, and Corrosion Limits
43
Table 5-5. Main Rotor Blade - Dent Limits
43
5-32.
Repair or Replacement - Main Rotor Blade
43
5-33.
Installation - Main Rotor Blade
43
5-34.
Touchup Refinish Procedure - Main Rotor Blade
43
5-34.1.
Preparation for Storage or Shipment - Main Rotor Blade
43
Section IX. Tracking Procedures
44
5-120.
Tracking and Operational Check - Main Rotor Blades
44
5-121.
Vibration Analysis - Main Rotor Blades
44
5-122.
Deleted
44
5-125.
Tracking and Balancing with the Vibrex 4591 System
44
5-126.
General
44
5-127.
Description
44
5-128.
Main Rotor Track and Balance
44
5-129.
Attach Test Equipment to Aircraft
45
5-130.
Hover Track of Main Rotor with Metal Blades
45
5-131.
Check Main Rotor Balance
45
5-132.
Correct Main Rotor Balance
45
5-133.
Check Main Rotor In-Flight Track
45
5-134.
Correct In-Flight Track
45
5-140.
Vibration Source Location
46
Table 5-7. Operating Speeds
46
5-141.
Troubleshooting
46
Table 5-8. Troubleshooting
46
12902 South Broadway • Los Angeles, California 90061
Sheet 5 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
204P2100-101 AND -103 MAIN ROTOR BLADE ASSEMBLY: FOR TH-1F MODELS
(T.O. 1H-1(U)F-2-1), FOR UH-1F MODELS (T.O. 1H-1(U)F-2-1), AND FOR UH-1P
MODELS (T.O. 1H-1(U)F-2-1)
47
I. General Information
47
1-1. General Information
47
1-13. Leading Particulars
47
Table 1-1. Leading Particulars
47
1-14. Station Locations
47
Figure 1-2. Station Locations
47
1-22. Preservation
48
1-28.
Long Term Preservation
48
1-31.
Drive System - Preservation (Inoperable Engine)
48
1-40. Depreservation
48
1-42.
Long Term Depreservation
48
1-52.
Main Rotor Assembly
48
1-53. Extreme Climactic Environmental Maintanence
49
1-54.
Extremes in Temperature
49
II. Ground Handling, Servicing, and Lubrication Instructions
50
2-1. Ground Handling
50
2-2.
General
50
2-3.
Towing
50
2-5.
Towing
50
Figure 2-1. Towing and Parking
50
2-34.
Parking
50
2-35.
Parking Procedures
51
2-36.
Anchoring and Mooring
51
2-37.
Mooring Procedures
51
Figure 2-14. Typical Mooring
51
12902 South Broadway • Los Angeles, California 90061
Sheet 6 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
2-38.
Blade Tie Down
51
2-39.
Jacking
51
2-41.
Jacking Procedure
51
2-43.
Jacking for Weighing
52
2-47.
Hoisting
52
2-48.
Maintenance Hoist
52
Figure 2-15. Jacking-Hoisting-Leveling
52
2-56.
Cold Weather Ground Check
52
2-57. Servicing
52
2-58.
General
52
2-70. Air Transportability
53
2-71.
General
53
2-74. Torque Requirements
53
2-75.
Torqueing Instructions
53
2-76.
Torqueing Limits
53
Table 2-1. Standard Torque Values
53
Figure 2-24. Torque Values
53
2-77.
Correct Recommended Torque
54
2-78.
Torque - Tightening Procedures
54
2-79.
Use of Extension Wrench (Crowfoot)
54
2-80.
Measuring Effective Length of Crowfoot Wrench
54
Figure 2-26. Torque Values for Studs
54
2-81.
Determination of Gage Reading when using a Crowfoot Wrench
54
Figure 2-27. Decimal Equivalent Conversion Table
54
Figure 2-28. Temperature Conversion Chart (Fahrenheit to Centigrade)
55
Figure 2-29. Measuring Effective Length of Extension Wrench
55
Figure 2-30. Torque Application using Extension Wrench
55
2-86. Materials Required
55
Table 2-3. Materials Required
55
Figure 2-34. Special Tools and Equipment
55
2-87. Special Tools and Equipment
56
Table 2-4. Special Tools and Equipment
56
12902 South Broadway • Los Angeles, California 90061
Sheet 7 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
VII. Main and Tail Rotor and Flight Controls
57
7-1. Main Rotor Hub and Blade Assembly
57
7-2.
Description
57
Figure 7-1. Main Rotor Group
57
Figure 7-2. Rotor System Torque Values
57
Figure 7-3. Main Rotor Hub and Blade Assembly
57
7-3.
Removal - Main Rotor Hub and Blade Assembly
57
Figure 7-4. Grip Positioning Links
57
7-4.
Alternate Removal - Main Rotor Hub and Blade Assembly
58
7-4A. Removal - of Pitch Change Link Assembly
58
7-5.
Removal - Main Rotor Blades
58
7-6.
Inspection and Repair Main Rotor Blades
58
7-7.
Inspection and Repair Drag Brace Assembly
58
Figure 7-5. Blade Removal
58
7-8.
Covering Leading Edge of Main Rotor Blades
58
Figure 7-8. Rotor Blade Retention Bolt Extracting Fixture
59
7-17.
Reassembly after Replacement of Main Rotor Blade Retention Straps
59
7-19.
Installation - Main Rotors
59
7-20.
Aligning - Main Rotors
59
Figure 7-16. Main Rotor Blade Alignment
59
Figure 7-17. Blade Alignment Jig Assembly
59
7-21.
Installation - Main Rotor Hub and Blade Assembly
59
Figure 7-18. Pitch Change Link Assembly
60
7-22.
Alternate Installation - Main Rotor Hub and Blade Assembly
60
7-23.
Setting Minimum Blade Angle - Main Rotor
60
7-24.
Clean Main Rotor Blades
60
7-25.
Operational Check of Main Rotor
60
7-26.
Vibrations
60
7-27.
Extreme Low Frequency Vibration
60
7-28.
Low Frequency Vibration
61
7-29.
Medium Frequency Vibration
61
7-30.
High Frequency Vibration
61
7-30A.
Vibration Analysis and Troubleshooting
61
12902 South Broadway • Los Angeles, California 90061
Sheet 8 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
7-31. Tracking and Balancing Main and Tail Rotor Assembly
62
7-32.
Vibrex System Tracking and Balancing Main and Tail Rotor Blades and Hubs
62
7-33.
Description of Equipment
62
Table 7-1. Tools and Equipment Required
62
Figure 7-20. Description and Specification of the Vibrex System
62
Figure 7-20A. Spectrum Analyzer, Model 192
62
Figure 7-21. Vibrex B Equipment
62
Figure 7-22. Vibrex / Airframe Interface
63
Figure 7-23. Phase Relationships for Improperly and Properly Tuned Filters
63
Figure 7-24. Typical Charts
63
Figure 7-25. Accurate Charts
63
Figure 7-26. Balance Chart Clock Angle Corrector Instruction Sheet
63
Figure 7-27. Balance Chart Clock Angle Corrector
63
Figure 7-28. Reclocked Chart
63
7-34.
Operating Equipment
64
Figure 7-29. Installation of Interrupter on Swashplate
64
Figure 7-30. Installation Magnetic Pickup
64
7-35.
Installation of Equipment
64
Figure 7-31. Installation of Interrupter
64
Figure 7-32. Adjustment of Magnetic Pickup Clearance
64
Figure 7-33. Installation of Magnetic Pickup and Accelerometer Cable
64
Figure 7-34. Installation of Retro-Reflective Tape to Main Rotor Tip Targets
65
Figure 7-35. Installation of Tip Targets
65
Figure 7-36. Installation of Accelerometer and Bracket, PN 3382
65
Figure 7-37. Installation of Reflective Target Tape to Blade Grip
65
Figure 7-38. Installation of Retro-Reflective Target Tape to Blade Tip
65
7-36.
Hover Tracking Main Rotor
65
Figure 7-39. Stopped Target Image Tail Rotor
65
Figure 7-40. Hover and Ground Track Blade Pattern
66
7-37.
Dynamic Balancing of Main Rotor
66
7-38.
Inflight Tracking Main Rotor Blades
66
Figure 7-42. Balance Chart Main Rotor (Typical)
66
Figure 7-43. Inflight Track Blade Pattern
66
12902 South Broadway • Los Angeles, California 90061
Sheet 9 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
7-41.
Troubleshooting Vibration using Vibrex B
66
7-42.
Removal of Equipment
66
7-43.
Tracking Flag Method
67
Figure 7-44. Tracking Main Rotor
67
7-44.
Vibration Check and Adjustment of Main Rotor
67
Figure 7-45. Main Rotor Tracking Procedure
67
Figure 7-46. Rotor Smoothing Procedure
67
7-45.
Sweeping Blade of Main Rotor
67
7-46.
Autorotation RPM Adjustment of Main Rotor
67
Figure 7-47. Troubleshooting Lateral Vibration
68
Figure 7-48. Trim Tab Bender and Gage Application
68
Figure 7-49. Tracking Flag
68
7-47.
Adjusting for Collective Forces
68
7-48.
Adjustment - Collective Pitch Force - Main Rotor Hub and Blade Assembly
68
Figure 7-50. Collective Pitch Retention Strap Adjustment
68
7-49.
Resetting Tension Torsion Straps to Initial Settings
68
7-50.
Resetting Main Rotor Grip Strap
69
7-51.
Troubleshooting Rotors and Controls
69
Table 7-2. Troubleshooting Rotors and Controls
69
7-101. Packaging and Preservation of Components
69
7-102.
Installing Main Rotor Blades in Shipping Containers
69
12902 South Broadway • Los Angeles, California 90061
Sheet 10 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
204P2100-101 AND -103 MAIN ROTOR BLADE ASSEMBLY: FOR 204B MODELS
(BHT-204B-M&O-1)
70
Introduction
70
1. Use of the Manual
70
2. Bulletins
70
3. Consumable Materials
70
4. Special Tools
70
5. Torques
70
6. Terminology
71
7.
Warnings, Cautions, and Notes
71
8.
Use of Procedural Words
71
9. Wear Limits
71
10. Standard Practices
71
11. Replacement Parts and Assemblies
71
Section I. General Information
72
Figure 1-1. 204B Helicopter
72
1-1. General Information
72
1-2. Description
72
1-3.
General
72
1-7.
Main Rotor
72
1-20. Helicopter Dimensions
72
1-21. Ground Handling
73
Figure 1-2. Three-View Dimensional Diagram
73
Figure 1-3. Station Line Diagram
73
Figure 1-4. Ground Handling (Hoisting, Jacking, Leveling, and Towing)
73
1-29.
Parking - Normal Conditions
73
1-30.
Parking - Turbulent Conditions
73
1-31.
Mooring
73
Figure 1-5. Parking and Mooring
74
12902 South Broadway • Los Angeles, California 90061
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
1-32. Helicopter Storage
74
1-33.
Environmental Conditions
74
1-34.
Flyable Storage
74
1-35.
Short Term Storage
74
1-36.
Intermediate Storage
74
1-67. Maintenance Hoist
74
1-78. Inspection
75
1-79.
Daily Inspection
75
1-79.
Daily Inspection
75
1-80.
100 Hour Inspection
75
1-81.
1000 Hour Inspection
75
1-82.
3000 Hour Inspection
75
1-83.
1000 Hour Component Overhaul
75
1-84.
1500 Hour Component Overhaul
76
1-85.
2000 Hour Component Overhaul
76
1-86.
2400 Hour Component Overhaul
76
1-86A.
2500 Hour Component Overhaul
76
1-87.
Between 5 and 10 Hours of Flight After Installation
76
1-88.
Each 10 Hours of Component Operation
76
1-89.
Each 25 Hours of Component Operation
76
1-90.
Between 25 and 30 Hours of Flight After Installation
77
1-91.
Each 50 Hours or 15/30 Days
77
1-92.
100 Hours After Initial Installation of Tailboom
77
1-93.
Each 100 Hours
77
1-94.
Each 100 Hours or 3 Months, Whichever Occurs First
77
1-95.
Each 300 Hours or 3 Months, Whichever Occurs First
77
1-96.
Each 500 Hours or 12 Months, Whichever Occurs First
77
1-96A.
Each 24 Months
78
1-96B.
Deleted
78
1-97.
Each 1200 Hours or 24 Months, Whichever Occurs First
78
1-98.
Hard Landing
78
1-99.
Sudden Stoppage - Power On or Off
78
1-100.
Overspeed
78
1-101.
Overtorque
78
12902 South Broadway • Los Angeles, California 90061
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
1-102.
Compressor Surge or Stall
79
1-103.
Lightning Strikes
79
1-104.
Magnetic Compass Malfunction
79
1-105.
Overhaul Evaluation Criteria
79
1-106. Airworthiness Limitations Schedule
79
Table 1-2. Airworthiness Limitations Schedule
79
Section II. Main Rotor Hub and Blade Assembly
80
2-1. Main Rotor Hub and Blade Assembly
80
2-2.
Description
80
2-3.
Removal - Main Rotor Hub and Blade Assembly
80
2-4. Main Rotor Blades
80
2-5.
Description
80
2-6.
Removal - Main Rotor Blades
80
Figure 2-1. Main Rotor Assembly
80
Figure 2-2. Grip Positioning Links
81
2-7.
Installation - Main Rotor Blades
81
Figure 2-3. Removing Rotor Blades
81
Figure 2-4. Main Rotor Blade Retention Bolt Extracting Fixture
81
2-8.
Preventative Maintenance - Main Rotor Blades
81
2-9.
Leading Edge Protection - Main Rotor Blades (Polyurethane Tape)
81
2-10.
Daily Inspection - Main Rotor Blades
81
2-11.
1000 Hour Inspection and Repair - Main Rotor Blades
82
Figure 2-5. Main Rotor Blade Repair
82
2-12.
Conditional Inspection - Main Rotor Blades
82
2-13.
Inspection - Main Rotor Blades
82
2-14.
Field Repairs - Main Rotor Blades
82
2-15.
Trim Tab Replacement - Main Rotor Blade
82
Figure 2-6. Trim Tab Replacement
82
2-16.
Main Rotor Blade Splice Cover
83
2-17.
Installation - Main Rotor Blade Splice Cover
83
2-18.
Preservation, Storage, and Blade Packaging
83
12902 South Broadway • Los Angeles, California 90061
Sheet 13 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
2-19. Main Rotor Hub
83
2-43.
Balancing - Main Rotor Hub Assembly
83
Figure 2-34. Balancing Main Rotor Hub
83
2-44.
Installation - Main Rotor Blades
83
2-45.
Alignment - Main Rotor Blades
84
2-46.
Installation - Main Rotor Hub and Blade Assembly
84
Figure 2-35. Main Rotor Blade Alignment
84
2-47.
Torque Limits - Main Rotor
84
2-48. Maintenance Operational Check - Main Rotor
84
2-49.
Tracking - Main Rotor Blades
84
Figure 2-36. Rotor System Torque Limits
84
Figure 2-37. Tracking Main Rotor Blades
85
Figure 2-38. Trim Tab Bender and Gage Application
85
2-50.
Spanwise Balance Check
85
2-51.
Chordwise Balance Check
85
2-52.
Autorotation RPM Check
85
2-53.
Collective Pitch Force Check and Adjustment
85
Figure 2-39. Collective Force Pitch Adjustment
85
2-54. Main Rotor Hub Sealing
86
12902 South Broadway • Los Angeles, California 90061
Sheet 14 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
204P2100-101 AND -103 MAIN ROTOR BLADE ASSEMBLY: FOR 205A MODELS
(BHT-205A1-MM-1) AND FOR 205A-1 MODELS (BHT-205A1-MM-1)
87
Chapter 1. Introduction
87
1-1. General
87
1-2. Helicopter Description
87
Figure 1-1. Model 204A-1 Helicopter (Typical)
87
1-3. Use of the Manual
87
1-4. Bulletins
87
1-5. Consumable Materials
87
1-6. Special Tools
89
1-7. Torques
89
1-8. Terminology
89
1-9.
Warnings, Cautions, and Notes
89
1-10.
Use of Procedural Words
89
1-11. Wear Limits
89
1-12. Standard Practices
89
1-13. Replacement Parts and Assemblies
90
Chapter 4. Airworthiness Limitations
91
4-1. Airworthiness Limitations Schedule
91
Chapter 5. Inspections
92
Inspections
92
5-1.
General
92
5-2.
Inspection Requirements
92
5-3.
Crash Damage
92
5-4.
Types of Inspections
92
5-5.
Definitions
92
5-6.
Inspection and Overhaul Tolerance
92
12902 South Broadway • Los Angeles, California 90061
Sheet 15 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Scheduled Inspections
93
5-7.
Scheduled Inspections
93
5-8.
Daily Inspection
93
5-9.
100 Hour Inspection
93
5-10.
1000 Hour Inspection
93
Special Inspections
94
5-11.
Special Inspections
94
5-12.
Daily or Each 10 Hours of Flight Operation, Whichever Occurs First until 250 Hours
94
5-13.
Between 5 and 10 Hours of Flight After Installation
94
5-14.
Each 8 Hours of Component Operation
94
5-15.
Each 25 Hours of Component Operation
94
5-16.
Each 25 Hours for the Next Four Inspections
94
5-17.
Each 25 Hours of Component Operation or 15 Days, or Each 5 Days for Blades Operating in a Salt
Laden Atmosphere, Whichever Occurs First
95
5-18.
100 Hours After Each Installation
95
5-19.
Main Rotor Grip Ultrasonic Inspection
95
5-20.
Each 300 Hours of Component Operation
95
5-21.
Each 300 Hours or 3 Months of Component Operation
95
5-22.
Each 500 Hours of Component Operation
95
5-23.
Each 600 Hours/6 Months of Tail Rotor Drive Shaft Coupling Operation
96
5-24.
Each 600 Hours or 12 Months of Component Operation
96
5-25.
Each 6 Months
96
5-26.
Each 12 Months
96
5-27.
Each 1000 Hours or 12 Months of Component Operation
96
5-28.
First 1000 Hours of Component Time and Each 3000 Hours Thereafter of Component Time
96
5-29.
Each 1200 Hours of Component Operation - Deleted
97
5-30.
Each 1200 Hours or 24 Months, Whichever Comes First
97
5-31.
Each 24 Months of Flight Control System Bolt Operation
97
5-32.
Each 3000 Hours of Component Operation
97
5-33.
Each 3100 Hours of Component Operation
97
12902 South Broadway • Los Angeles, California 90061
Sheet 16 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Conditional Inspections
98
5-34.
Conditional Inspections
98
5-35.
Hard Landing
98
5-36.
After Blade Strike or Other Rotating System Torque Spike Spike
98
5-37.
Sudden Stoppage/Acceleration - Main Rotor
98
5-38.
Sudden Stoppage/Acceleration - Tail Rotor
98
5-39.
Overspeed
98
5-40.
Overtorque
99
5-41.
Compressor Stall or Surge
99
5-42.
Lightning Strikes
99
5-43.
Magnetic Compass Malfunction
99
Component Overhaul Schedule
100
5-44.
Component Overhaul Schedule
100
Figure 5-1. Component Overhaul Schedule
100
Chapter 6. Dimensions and Charts
101
6-1. Principal Dimensions
101
6-2. Stations, Waterlines, and Buttocklines
101
Figure 6-1. Principal Dimensions
101
Figure 6-2. Station Diagram
101
Chapter 7. Lifting and Jacking
102
7-1. Lifting and Jacking
102
7-2. Lifting the Complete Helicopter
102
7-3. Lifting the Tailboom Only
102
7-4. Jacking
102
Figure 7-1. Jacking
102
Chapter 9. Towing
103
9-1. Towing
103
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HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Chapter 10. Parking and Mooring
104
10-1. Parking - Normal Conditions
104
10-2. Parking - Turbulent Conditions
104
10-3. Mooring
104
Figure 10-1. Parking and Mooring
104
10-4. Helicopter Storage
104
10-5.
Environmental Conditions
104
10-6.
Flyable Storage
104
10-7.
Short Term Storage
105
10-8.
Intermediate Storage
105
Chapter 65. Rotor System
106
65-1. Rotor System
106
65-2. Vibration Analysis
106
65-3.
Extreme Low Frequency Vibration
106
65-4.
Low Frequency Vibration
106
65-5.
Medium Frequency Vibration
106
65-6.
High Frequency Vibration
106
65-7. Main Rotor Troubleshooting
107
Table 65-1. Main Rotor Troubleshooting
107
65-9. Operational Check - Main Rotor System
107
65-10.
Main Rotor Tracking
107
Figure 65-1. Main Rotor Tracking Procedure
107
65-11.
Main Rotor Blade Vibration Check and Adjustment
107
65-12.
Main Rotor Blade Sweeping
107
65-13.
Main Rotor Autorotation RPM Adjustment
108
Figure 65-2. Lateral Vibration Check
108
Figure 65-3. Rotor Smoothing Procedure
108
Figure 65-4. Trim Tab Bender and Gage
108
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Change Letter: D
Change Date:
01/03/2020
65-14. Main Rotor Hub and Blade
108
65-15.
Removal - Main Rotor Hub and Blade
108
65-15A. Inspection and Repair - Main Rotor Hub and Blade
108
65-16.
Installation - Main Rotor Hub and Blade
109
Figure 65-5. Main Rotor System
109
Figure 65-6. Main Rotor Retaining Nut Damage and Repair Limits
109
Figure 65-7. Main Rotor Cone Set Damage and Repair Limits
109
65-17.
Minimum Blade Angle - Main Rotor Hub and Blade
109
65-18.
Collective Pitch Forces - Adjustment
109
Figure 65-8. Main Rotor System Torque Values
109
Figure 65-9. Collective Pitch Retention Strap Adjustment
110
65-19.
Resetting Main Rotor Grip Tension-Torsion Strap
110
65-20.
Resetting Main Rotor Grip Tension-Torsion Strap - Initial Setting
110
65-21. Main Rotor Blades
110
65-22.
Preventative Maintenance for Main Rotor Blades
110
65-23.
Main Rotor Blade Daily Inspection
110
65-24.
Nonrepairable Damage - Main Rotor Blades
110
65-25.
Inspection and Minor Repair - Main Rotor Blades
111
Figure 65-10. Main Rotor Blade
111
65-26.
Field Repairs - Main Rotor Blades
111
Figure 65-11. Main Rotor Blade Repair
111
65-27.
Polyurethane Tape - Installation
111
65-28.
Deleted
111
65-29.
Main Rotor Blade Paint Touch-Up
111
65-30.
Main Rotor Blade Trim Tab
112
65-31.
Replacement - Main Rotor Blade - Trim Tab
112
Figure 65-12. Trim Tab Replacement
112
HTC SPECIFIC INSPECTIONS
113
For 500P2100-101 Only: Main Rotor Blade Root End Periodic Inspection Requirements
113
Required Materials
113
Inspection Instructions
113
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Sheet 19 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
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12902 South Broadway • Los Angeles, California 90061
Sheet 20 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
PURPOSE
The purpose of this document is to both provide instructions for
Maintenance and Use of HTC produced Main Rotor Blade Assemblies
and to provide an index to the relevant Chapters or Sections of the
applicable Maintenance Manual for the particular model of helicopter.
It is extremely important that these relevant sections of the be followed
precisely.
The most current revision of this document
(HTCM-006) will be
available on the Helicopter Technology Company (HTC) website at
www.helicoptertech.com under Technical Publications.
Note:
As applicable and unless otherwise noted, all references below are
to be found in:
 Technical Manual -
Aviation and Intermediate Maintenance Instructions Army Model
UH-1H/V/EH-1H/X (TM 55-1520-210-23-1).
 Helicopter Maintenance Manual -
Supplement No. 1 to Army Model UH-1B Helicopter
(Restricted Category).
 Technical Manual -
Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P
Helicopters - T.O. 1H-1(U)F-2-1.
12902 South Broadway • Los Angeles, California 90061
Sheet 21 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
 Maintenance and Overhaul Instructions -
Bell Model 204B - BHT-204B-M&O-1.
 Maintenance Manual -
Bell Model 205A-1 - BHT-205A1-MM-1.
Note:
HTC has used the best possible materials for the construction of its
Main Rotor Blade Assemblies.
12902 South Broadway • Los Angeles, California 90061
Sheet 22 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
REFERENCE DOCUMENTS
1.
Technical Manual
- Aviation and Intermediate Maintenance
Instructions Army Model UH-1H/V/EH-1H/X (TM 55-1520-210-23-1),
Headquarters, Department of the Army, Washington, D.C., Change
47, dated 20 September 2005, or later approved revision.
2.
Technical Manual
- Preventative Maintenance Daily Inspection
Checklist (TM 55-1520-210-PMD), Headquarters, Department of the
Army, Washington, D.C.
3.
Technical Manual - Phased Maintenance Checklist (TM 55-1520-210-
PM), Headquarters, Department of the Army, Washington, D.C.
4.
Federal Aviation Administration (FAA) Supplemental Type Certificate
(STC) Number SR00026DE, Rotorcraft Development Corp., Corvalis,
Montana, dated 06 September 2012, or later approved revision.
5.
Helicopter Maintenance Manual Supplement No. 1 to Army Model UH-
1B Helicopter (Restricted Category), San Joaquin Helicopters, Delano,
California.
6.
Technical Manual - Organizational Maintenance USAF Models TH-1F,
UH-1F, and UH-1P Helicopters - T.O. 1H-1(U)F-2-1, Secretary of the
Air Force, Washington, D.C., Change 14, dated 28 April 1988, or later
approved revision.
7.
Technical Manual
- Scheduled Inspection and Maintenance
Requirements USAF Series TH-1F, UH-1F, and UH-1P Helicopters -
T.O.
1H-1(U)F-2-6, Secretary of the Air Force, Washington, D.C.,
Change 16, dated 16 February 1988, or later approved revision.
12902 South Broadway • Los Angeles, California 90061
Sheet 23 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
8.
Maintenance and Overhaul Instructions - Bell Model 204B - BHT-
204B-M&O-1, Bell Helicopter, a Textron Company, Fort Worth, Texas,
Revision 10, dated 24 June 2011, or later approved revision.
9.
Maintenance Manual - Bell Model 205A-1 - BHT-205A1-MM-1, Bell
Helicopter, a Textron Company, Fort Worth, Texas, Revision 7, dated
08 July 2013, or later approved revision.
10.
FAA Airworthiness Directive (AD) 2018-02-07 - Applicability: TH-1F,
UH-1B with STC SR0026DE Installed, UH-1F,UH-1H, and UH-1P,
dated 01 February 2018
11.
FAA Airworthiness Directive (AD) 2018-02-08 - Applicability: 204B,
205A, and 205A-1, dated 01 February 2018
12.
Mandatory Service Bulletin
(SB)
204-2100-1R3, Main Rotor Blade
Root End Periodic Inspection and Protection, Revision
3
-
Applicability: UH-1H, UH-1B with STC SR0026DE Installed, TH-1F,
UH-1F, UH-1P, 204B, 205A, 205A-1, Helicopter Technology Company
(HTC), dated 12 December 2017.
12902 South Broadway • Los Angeles, California 90061
Sheet 24 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
DEFINITIONS AND ABBREVIATIONS
As applicable and unless otherwise noted, all Definitions and
Abbreviations are to be found in:
 Technical Manual -
Aviation and Intermediate Maintenance Instructions Army Model
UH-1H/V/EH-1H/X (TM 55-1520-210-23-1).
 Helicopter Maintenance Manual -
Supplement No. 1 to Army Model UH-1B Helicopter
(Restricted Category).
 Technical Manual -
Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P
Helicopters - T.O. 1H-1(U)F-2-1.
 Maintenance and Overhaul Instructions -
Bell Model 204B - BHT-204B-M&O-1.
 Maintenance Manual -
Bell Model 205A-1 - BHT-205A1-MM-1.
12902 South Broadway • Los Angeles, California 90061
Sheet 25 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
WEIGHT AND BALANCE
Installation of the Helicopter Technology Company
(HTC) Part Number
204P2100-101 and/or -103 Main Rotor Blade is a direct replacement the Bell
Helicopter - Textron Part Number 204-011-250-113 Main Rotor Blade and does
not constitute a change to the Weight and Balance of the aircraft.
12902 South Broadway • Los Angeles, California 90061
Sheet 26 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
WARNINGS
As applicable and unless otherwise noted, all Warnings are to be
found in:
 Technical Manual -
Aviation and Intermediate Maintenance Instructions Army Model
UH-1H/V/EH-1H/X (TM 55-1520-210-23-1).
 Helicopter Maintenance Manual -
Supplement No. 1 to Army Model UH-1B Helicopter
(Restricted Category).
 Technical Manual -
Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P
Helicopters - T.O. 1H-1(U)F-2-1.
 Maintenance and Overhaul Instructions -
Bell Model 204B - BHT-204B-M&O-1.
 Maintenance Manual -
Bell Model 205A-1 - BHT-205A1-MM-1.
12902 South Broadway • Los Angeles, California 90061
Sheet 27 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
INDEX
Index is to be found in the Technical Manual
- Aviation and
Intermediate Maintenance Instructions Army Model UH-1H/V/EH-1H/X
(TM
55-1520-210-23-1), Headquarters, Department of the Army,
Washington D.C. unless otherwise noted.
As applicable and unless otherwise noted, the Index is to be found in:
 Technical Manual -
Aviation and Intermediate Maintenance Instructions Army Model
UH-1H/V/EH-1H/X (TM 55-1520-210-23-1).
 Helicopter Maintenance Manual -
Supplement No. 1 to Army Model UH-1B Helicopter
(Restricted Category).
 Technical Manual -
Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P
Helicopters - T.O. 1H-1(U)F-2-1.
 Maintenance and Overhaul Instructions -
Bell Model 204B - BHT-204B-M&O-1.
 Maintenance Manual -
Bell Model 205A-1 - BHT-205A1-MM-1.
12902 South Broadway • Los Angeles, California 90061
Sheet 28 of 114 - HTC Proprietary Data Not to be Distributed
4/13/2020
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the
following UH-1H Models:
JJASPP Engineering Services (R00004RC)
Tamarack Helicopters (R00010SE)
OAS Parts LLC (H7SO)
Rotorcraft Dev. Corp. (H13WE)
Southwest Florida Aviation (H6SO)
Global Helicopter Technology (R00002RC)
Hagglund Helicopters (H15NM)
Arrow Falcon Exporters (R00007DE)
Richard’s Heavylift Helo Inc. (H3SO)
Northwest Rotorcraft (R00005SE)
Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the
following UH-1B Models with STC SR00026DE Installed:
Rotorcraft Dev. Corp. (H3NM)
Rotorcraft Dev. Corp. (H13WE)
San Joaquin Helicopters (H1RM)
International Helicopters (H5SO)
Richards Heavylift Helo, Inc. (H3SO)
OAS Parts LLC (H7SO)
Note: On UH-1B Models with STC SR00026DE Installed, reference FAA STC
Number SR00026DE and San Joaquin Helicopters Helicopter
Maintenance Manual Supplement No. 1 to Army Model UH-1B Helicopter
(Restricted Category).
Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the
following TH-1F Models:
Rotorcraft Dev. Corp. (H12NM)
Tamarack Helicopters (H7NE)
Robinson Air Crane, Inc. (R00008AT)
12902 South Broadway • Los Angeles, California 90061
Sheet 31 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the
following UH-1F Models:
Rotorcraft Dev. Corp. (H12NM)
Tamarack Helicopters (H7NE)
Robinson Air Crane, Inc. (R00008AT)
AST, Inc (H11SW)
California Department of Forestry (H2NM)
Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the
following UH-1P Models:
Rotorcraft Dev. Corp. (H12NM)
Robinson Air Crane, Inc. (R00008AT)
Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the
following 204B Model:
Bell Helicopter Textron, Inc. (H1SW)
Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the
following 205A Model:
Bell Helicopter Textron, Inc. (H1SW)
Part Number 204P2100-101101 and -103 Main Rotor Blade is applicable on the
following 205A-1 Model:
Bell Helicopter Textron, Inc. (H1SW)
12902 South Broadway • Los Angeles, California 90061
Sheet 32 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
204P2100-101 AND
-103 MAIN ROTOR BLADE
ASSEMBLY:
FOR UH-1H MODELS (TM 55-1520-210-23-1)
AND
FOR UH-1B MODELS WITH STC NUMBER
SR00026DE INSTALLED (TM 55-1520-210-23-1)
CHAPTER 1. INTRODUCTION
Section I. Servicing
1-7. Main and Tail Rotor System
Refer to Paragraph 1-7.
1-14. Cleaning
1-15. Description - Cleaning
Refer to Paragraph 1-15.
1-19. Rotor Blades - Cleaning
Refer to Paragraph 1-19.
1-20. Treatment of Aluminum and Magnesium Corrosion
Refer to Paragraph 1-20.
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
1-21. Snow and Ice Removal
Refer to Paragraph 1-21.
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
1-22. Consumable Maintenance Supplies and Materials
1-23. Description - Consumable Maintenance Supplies and Materials
Refer to Paragraph 1-23.
Table 1-1. Consumable Maintenance Supplies and Materials
Refer to Table 1-1.
1-24. Special Tools and Test Equipment
1-25. Description - Special Tools and Test Equipment
Refer to Paragraph 1-25.
Table 1-2. Special Tools and Test Equipment
Refer to Table 1-2.
12902 South Broadway • Los Angeles, California 90061
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
1-26. Support Equipment
1-27. Description - Support Equipment
Refer to Paragraph 1-27.
Table 1-3. Support Equipment
Refer to Table 1-3.
1-28. Standard Torque Procedures and Requirements
Refer to Paragraph 1-28.
Table 1-4. Standard Torque Chart
Refer to Table 1-4.
1-29. Reuse of Self-Locking Nuts
Refer to Paragraph 1-29.
Table 1-7. Minimum Breakaway Torque
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Change Date:
01/03/2020
SECTION IV. INSPECTION REQUIREMENTS
1-56. General Information
Refer to Paragraph 1-56.
1-57. Standards of Serviceability
Refer to Paragraph 1-57.
1-58. Special Inspection
1-59. Description - Special Inspection
Refer to Paragraph 1-59.
1-60. Definition and General Information - Special Inspection
Refer to Paragraph 1-60.
1-61. Requirements - Special Inspection
Refer to Paragraph 1-61.
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Section V. Overhaul and Retirement Schedule
1-62. Introduction
Refer to Paragraph 1-62.
1-63. Overhaul Interval
1-64. Description - Overhaul Interval
Refer to Paragraph 1-64.
1-65. Retirement Schedule
1-66. Description - Retirement Schedule
Refer to Paragraph 1-66.
Table 1-8. Overhaul and Retirement Schedule
Refer to Table 1-8.
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Section VI. Flight Safety Critical Aircraft Parts
1-67. Flight Safety Critical Aircraft Parts
Refer to Paragraph 1-67.
Table 1-9. Flight Safety Critical Aircraft Parts
Refer to Table 1-9.
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CHAPTER 5. ROTORS
Section I. Main Rotor System
5-1. Main Rotor System
5-2. Description - Main Rotor System
Refer to Paragraph 5-2.
5-3. Main Rotor Hub and Blade Assembly
5-4. Description - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-4.
5-5. Cleaning - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-5.
5-6. Lubrication - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-6.
5-7. Alignment - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-7.
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5-8. Adjustment, Collective Pitch Forces - Main Rotor Hub with Metal Blade
Installed
Refer to Paragraph 5-8.
5-9. Operational Check - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-9.
5-10. Autorotation RPM Adjusting - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-10.
5-11. Troubleshooting - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-11.
Table 5-1. Troubleshooting Main Rotor System
Refer to Table 5-1.
5-12. Removal - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-12.
5-13. Installation - Main Rotor Hub and Blade Assembly
Refer to Paragraph 5-13.
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Section III. Main Rotor Blades
5-27. Main Rotor Blade
5-28. Description - Main Rotor Blade
Refer to Paragraph 5-28.
5-29. Inspection - Main Rotor Blade (Installed)
Refer to Paragraph 5-29.
Table 5-3. Inspection Requirements Main Rotor Blade
Refer to Table 5-3.
5-30. Removal - Main Rotor Blade
Refer to Paragraph 5-30.
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5-31. Inspection - Main Rotor Blade
Refer to Paragraph 5-31.
Table 5-4. Main Rotor Blade - Repairable Nicks, Scratches, and Corrosion Limits
Refer to Table 5-4.
Table 5-5. Main Rotor Blade - Dent Limits
Refer to Table 5-5.
5-32. Repair or Replacement - Main Rotor Blade
Refer to Paragraph 5-32.
5-33. Installation - Main Rotor Blade
Refer to Paragraph 5-33.
5-34. Touchup Refinish Procedure - Main Rotor Blade
Refer to Paragraph 5-34.
5-34.1. Preparation for Storage or Shipment - Main Rotor Blade
Refer to Paragraph 5-34.1
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Section IX. Tracking Procedures
5-120. Tracking and Operational Check - Main Rotor Blades
Refer to Paragraph 5-120.
5-121. Vibration Analysis - Main Rotor Blades
Refer to Paragraph 5-121.
5-122. Deleted
Paragraph 5-122 has been Deleted.
5-125. Tracking and Balancing with the Vibrex 4591 System
5-126. General
Refer to Paragraph 5-126.
5-127. Equipment Description
Refer to Paragraph 5-127.
5-128. Main Rotor Track and Balance
Refer to Paragraph 5-128.
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5-129. Attach Test Equipment to Aircraft
Refer to Paragraph 5-129.
5-130. Hover Track of Main Rotor with Metal Blades
Refer to Paragraph 5-130.
5-131. Check Main Rotor Balance
Refer to Paragraph 5-131.
5-132. Correct Main Rotor Balance
Refer to Paragraph 5-132.
5-133. Check Main Rotor In-Flight Track
Refer to Paragraph 5-133.
5-134. Correct In-Flight Track
Refer to Paragraph 5-134.
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5-140. Vibration Source Location
Refer to Paragraph 5-140.
Table 5-7. Operating Speeds
Refer to Table 5-7.
5-141. Troubleshooting
Refer to Paragraph 5-141.
Table 5-8. Troubleshooting
Refer to Table 5-8.
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204P2100-101 AND
-103 MAIN ROTOR BLADE
ASSEMBLY:
FOR TH-1F MODELS (T.O. 1H-1(U)F-2-1),
FOR UH-1F MODELS (T.O. 1H-1(U)F-2-1),
AND
FOR UH-1P MODELS (T.O. 1H-1(U)F-2-1)
I. GENERAL INFORMATION
1-1. General Information
Refer to Paragraph 1-1.
1-13. Leading Particulars
Refer to Paragraph 1-13.
Table 1-1. Leading Particulars
Refer to Table 1-1.
1-14. Station Locations
Refer to Paragraph 1-14.
Figure 1-2. Station Locations
Refer to Figure 1-2.
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1-22. Preservation
Refer to Paragraph 1-22.
1-28. Long Term Preservation
Refer to Paragraph 1-28.
1-31. Drive System - Preservation (Inoperable Engine)
Refer to Paragraph 1-31.
1-40. Depreservation
Refer to Paragraph 1-40.
1-42. Long Term Depreservation
Refer to Paragraph 1-42.
1-52. Main Rotor Assembly
Refer to Paragraph 1-52.
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1-53. Extreme Climactic Environmental Maintenance
Refer to Paragraph 1-53.
1-54. Extremes in Temperature
Refer to Paragraph 1-54.
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II. GROUND HANDLING, SERVICING, AND LUBRICATION
INSTRUCTIONS
2-1. Ground Handling
Refer to Paragraph 2-1.
2-2. General
Refer to Paragraph 2-2.
2-3. Towing
Refer to Paragraph 2-3.
2-5. Towing
Refer to Paragraph 2-5.
Figure 2-1. Towing and Parking
Refer to Figure 2-1.
2-34. Parking
Refer to Paragraph 2-34.
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2-35. Parking Procedures
Refer to Paragraph 2-35.
2-36. Anchoring and Mooring
Refer to Paragraph 2-36.
2-37. Mooring Procedures
Refer to Paragraph 2-37.
Figure 2-14. Typical Mooring
Refer to Figure 2-14.
2-38. Blade Tie Down
Refer to Paragraph 2-38.
2-39. Jacking
Refer to Paragraph 2-39.
2-41. Jacking Procedure
Refer to Paragraph 2-41.
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2-43. Jacking for Weighing
Refer to Paragraph 2-43.
2-47. Hoisting
Refer to Paragraph 2-47.
2-48. Maintenance Hoist
Refer to Paragraph 2-48.
Figure 2-15. Jacking-Hoisting-Leveling
Refer to Figure 2-15.
2-56. Cold Weather Ground Check
Refer to Paragraph 2-56.
2-57. Servicing
Refer to Paragraph 2-57.
2-58. General
Refer to Paragraph 2-58.
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2-70. Air Transportability
Refer to Paragraph 2-70.
2-71. General
Refer to Paragraph 2-71.
2-74. Torque Requirements
Refer to Paragraph 2-74.
2-75. Torqueing Instructions
Refer to Paragraph 2-75.
2-76. Torqueing Limits
Refer to Paragraph 2-76.
Table 2-1. Standard Torque Values
Refer to Table 2-1.
Figure 2-24. Torque Values
Refer to Figure 2-24.
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2-77. Correct Recommended Torque
Refer to Paragraph 2-77.
2-78. Torque - Tightening Procedures
Refer to Paragraph 2-78.
2-79. Use of Extension Wrench (Crowfoot)
Refer to Paragraph 2-79.
2-80. Measuring Effective Length of Crowfoot Wrench
Refer to Paragraph 2-80.
Figure 2-26. Torque Values for Studs
Refer to Figure 2-26.
2-81. Determination of Gage Reading when using a Crowfoot Wrench
Refer to Paragraph 2-81.
Figure 2-27. Decimal Equivalent Conversion Table
Refer to Figure 2-27.
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Figure 2-28. Temperature Conversion Chart (Fahrenheit to Centigrade)
Refer to Figure 2-28.
Figure 2-29. Measuring Effective Length of Extension Wrench
Refer to Figure 2-29.
Figure 2-30. Torque Application using Extension Wrench
Refer to Figure 2-30.
2-86. Materials Required
Refer to Paragraph 2-86.
Table 2-3. Materials Required
Refer to Table 2-3.
Figure 2-34. Special Tools and Equipment
Refer to Figure 2-34.
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2-87. Special Tools and Equipment
Refer to Paragraph 2-87.
Table 2-4. Special Tools and Equipment
Refer to Table 2-4.
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VII. MAIN AND TAIL ROTOR AND FLIGHT CONTROLS
7-1. Main Rotor Hub and Blade Assembly
Refer to Paragraph 7-1.
7-2. Description
Refer to Paragraph 7-2.
Figure 7-1. Main Rotor Group
Refer to Figure 7-1.
Figure 7-2. Rotor System Torque Values
Refer to Figure 7-2.
Figure 7-3. Main Rotor Hub and Blade Assembly
Refer to Figure 7-3.
7-3. Removal - Main Rotor Hub and Blade Assembly
Refer to Paragraph 7-3.
Figure 7-4. Grip Positioning Links
Refer to Figure 7-4.
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7-4. Alternate Removal - Main Rotor Hub and Blade Assembly
Refer to Paragraph 7-4.
7-4A. Removal of Pitch Change Link Assembly
Refer to Paragraph 7-4A.
7-5. Removal - Main Rotor Blades
Refer to Paragraph 7-5.
7-6. Inspection and Repair Main Rotor Blades
Refer to Paragraph 7-6.
7-7. Inspection and Repair Drag Brace Assembly
Refer to Paragraph 7-7.
Figure 7-5. Blade Removal
Refer to Figure 7-5.
7-8. Covering Leading Edge of Main Rotor Blades
Refer to Paragraph 7-8.
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Figure 7-8. Rotor Blade Retention Bolt Extracting Fixture
Refer to Figure 7-8.
7-17. Reassembly after Replacement of Main Rotor Blade Retention
Straps
Refer to Paragraph 7-17.
7-19. Installation - Main Rotor Blades
Refer to Paragraph 7-19.
7-20. Aligning - Main Rotor Blades
Refer to Paragraph 7-20.
Figure 7-16. Main Rotor Blade Alignment
Refer to Figure 7-16.
Figure 7-17. Blade Alignment Jig Assembly
Refer to Figure 7-17.
7-21. Installation - Main Rotor Hub and Blade Assembly
Refer to Paragraph 7-21.
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Figure 7-18. Pitch Change Link Assembly
Refer to Figure 7-18.
7-22. Alternate Installation - Main Rotor Hub and Blade Assembly
Refer to Paragraph 7-22.
7-23. Setting Minimum Blade Angle - Main Rotor
Refer to Paragraph 7-23.
7-24. Clean Main Rotor Blades
Refer to Paragraph 7-24.
7-25. Operational Check of Main Rotor
Refer to Paragraph 7-25.
7-26. Vibrations
Refer to Paragraph 7-26.
7-27. Extreme Low Frequency Vibration
Refer to Paragraph 7-27.
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7-28. Low Frequency Vibration
Refer to Paragraph 7-28.
7-29. Medium Frequency Vibration
Refer to Paragraph 7-29.
7-30. High Frequency Vibration
Refer to Paragraph 7-30.
7-30A. Vibration Analysis and Troubleshooting
Refer to Paragraph 7-30A.
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7-31. Tracking and Balancing Main and Tail Rotor Assembly
Refer to Paragraph 7-31.
7-32. Vibrex System Tracking and Balancing Main and Tail Rotor Blades
and Hubs
Refer to Paragraph 7-32.
7-33. Description of Equipment
Refer to Paragraph 7-33.
Table 7-1. Tools and Equipment Required
Refer to Table 7-1.
Figure 7-20. Description and Specifications of the Vibrex System
Refer to Figure 7-20.
Figure 7-20A. Spectrum Analyzer, Model 192
Refer to Figure 7-20A.
Figure 7-21. Vibrex B Equipment
Refer to Figure 7-21.
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Figure 7-22. Vibrex / Airframe Interface
Refer to Figure 7-22.
Figure 7-23. Phase Relationships for Improperly and Properly Tuned Filters
Refer to Figure 7-23.
Figure 7-24. Typical Charts
Refer to Figure 7-24.
Figure 7-25. Accurate Charts
Refer to Figure 7-25.
Figure 7-26. Balance Chart Clock Angle Corrector Instruction Sheet
Refer to Figure 7-26.
Figure 7-27. Balance Chart Clock Angle Corrector
Refer to Figure 7-27.
Figure 7-28. Reclocked Chart
Refer to Figure 7-28.
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7-34. Operating Equipment
Refer to Paragraph 7-34.
Figure 7-29. Installation of Interrupter on Swashplate
Refer to Figure 7-29.
Figure 7-30. Installation Magnetic Pickup
Refer to Figure 7-30.
7-35. Installation of Equipment
Refer to Paragraph 7-35.
Figure 7-31. Installation of Interrupter
Refer to Figure 7-31.
Figure 7-32. Adjustment of Magnetic Pickup Clearance
Refer to Figure 7-32.
Figure 7-33. Installation of Magnetic Pickup and Accelerometer Cable
Refer to Figure 7-33.
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Figure 7-34. Installation of Retro-Reflective Tape to Main Rotor Tip Targets
Refer to Figure 7-34.
Figure 7-35. Installation of Tip Targets
Refer to Figure 7-35.
Figure 7-36. Installation of Accelerometer and Bracket, PN 3382
Refer to Figure 7-36.
Figure 7-37. Installation of Reflective Target Tape to Blade Grip
Refer to Figure 7-37.
Figure 7-38. Installation of Retro-Reflective Target Tape to Blade Tip
Refer to Figure 7-38.
7-36. Hover Tracking Rotor
Refer to Paragraph 7-36.
Figure 7-39. Stopped Target Image Tail Rotor
Refer to Figure 7-39.
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Figure 7-40. Hover and Ground Track Blade Pattern
Refer to Figure 7-40.
7-37. Dynamic Balancing of Main Rotor
Refer to Paragraph 7-37.
7-38. Inflight Tracking Main Rotor Blades
Refer to Paragraph 7-38.
Figure 7-42. Balance Chart, Main Rotor (Typical)
Refer to Figure 7-42.
Figure 7-43. Inflight Track Blade Pattern
Refer to Figure 7-43.
7-41. Troubleshooting Vibration using Vibrex B
Refer to Paragraph 7-41.
7-42. Removal of Equipment
Refer to Paragraph 7-42.
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7-43. Tracking Flag Method
Refer to Paragraph 7-43.
Figure 7-44. Tracking Main Rotor
Refer to Figure 7-44.
7-44. Vibration Check and Adjustment of Main Rotor
Refer to Paragraph 7-44.
Figure 7-45. Main Rotor Tracking Procedure
Refer to Figure 7-45.
Figure 7-46. Rotor Smoothing Procedure
Refer to Figure 7-46.
7-45. Sweeping Blade of Main Rotor
Refer to Paragraph 7-45.
7-46. Autorotation RPM Adjustment of Main Rotor
Refer to Paragraph 7-46.
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Figure 7-47. Troubleshooting Lateral Vibration
Refer to Figure 7-47.
Figure 7-48. Trim Tab Bender and Gage Application
Refer to Figure 7-48.
Figure 7-49. Tracking Flag
Refer to Figure 7-49.
7-47. Adjusting for Collective Forces
Refer to Paragraph 7-47.
7-48. Adjustment - Collective Pitch Force - Main Rotor Hub and Blade
Assembly
Refer to Paragraph 7-48.
Figure 7-50. Collective Pitch Retention Strap Adjustment
Refer to Figure 7-50.
7-49. Resetting Tension Torsion Straps to Initial Setting
Refer to Paragraph 7-49.
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7-50. Resetting Main Rotor Grip Strap
Refer to Paragraph 7-50.
7-51. Troubleshooting Rotors and Controls
Refer to Paragraph 7-51.
Table 7-2. Troubleshooting Rotors and Controls
Refer to Table 7-2.
7-101.
Packaging and Preservation of Components
Refer to Paragraph 7-101.
7-102. Installing Main Rotor Blades in Shipping Containers
Refer to Paragraph 7-102.
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204P2100-101 AND
-103 MAIN ROTOR
BLADE ASSEMBLY:
FOR 204B MODELS (BHT-204B-M&O-1)
INTRODUCTION
1. Use of the Manual
Refer to Paragraph 1.
2. Bulletins
Refer to Paragraph 2.
3. Consumable Materials
Refer to Paragraph 3.
4. Special Tools
Refer to Paragraph 4.
5. Torques
Refer to Paragraph 5.
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6. Terminology
Refer to Paragraph 6.
7.
Warnings, Cautions, and Notes
Refer to Paragraph 7.
8.
Use of Procedural Words
Refer to Paragraph 8.
9. Wear Limits
Refer to Paragraph 9.
10. Standard Practices
Refer to Paragraph 10.
11. Replacement Parts and Assemblies
Refer to Paragraph 11.
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SECTION I. GENERAL INFORMATION
Figure 1-1. 204B Helicopter
Refer to Figure 1-1.
1-1. General Information
Refer to Paragraph 1-1.
1-2. Description
Refer to Paragraph 1-2.
1-3. General
Refer to Paragraph 1-3.
1-7. Main Rotor
Refer to Paragraph 1-7.
1-20. Helicopter Dimensions
Refer to Paragraph 1-20.
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1-21. Ground Handling
Refer to Paragraph 1-21.
Figure 1-2. Three-View Dimensional Diagram
Refer to Figure 1-2.
Figure 1-3. Station Line Diagram
Refer to Figure 1-3.
Figure 1-4. Ground Handling (Hoisting, Jacking, Leveling, and Towing)
Refer to Figure 1-4.
1-29. Parking - Normal Conditions
Refer to Paragraph 1-29.
1-30. Parking - Turbulent Conditions
Refer to Paragraph 1-30.
1-31. Mooring
Refer to Paragraph 1-31.
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Figure 1-5. Parking and Mooring
Refer to Figure 1-5.
1-32. Helicopter Storage
Refer to Paragraph 1-32.
1-33. Environmental Conditions
Refer to Paragraph 1-33.
1-34. Flyable Storage
Refer to Paragraph 1-34.
1-35. Short Term Storage
Refer to Paragraph 1-35.
1-36. Intermediate Storage
Refer to Paragraph 1-36.
1-67. Maintenance Hoist
Refer to Paragraph 1-67.
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1-78. Inspection
Refer to Paragraph 1-78.
1-79. Daily Inspection
Refer to Paragraph 1-79.
1-79. Daily Inspection
Refer to Paragraph 1-79.
1-80.
100 Hour Inspection
Refer to Paragraph 1-80.
1-81.
1000 Hour Inspection
Refer to Paragraph 1-81.
1-82.
3000 Hour Inspection
Refer to Paragraph 1-82.
1-83.
1000 Hour Component Overhaul
Refer to Paragraph 1-83.
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1-84.
1500 Hour Component Overhaul
Refer to Paragraph 1-84.
1-85.
2000 Hour Component Overhaul
Refer to Paragraph 1-85.
1-86.
2400 Hour Component Overhaul
Refer to Paragraph 1-86.
1-86A. 2500 Hour Component Overhaul
Refer to Paragraph 1-86A.
1-87. Between 5 and 10 Hours of Flight After Installation
Refer to Paragraph 1-87.
1-88. Each 10 Hours of Component Operation
Refer to Paragraph 1-88.
1-89. Each 25 Hours of Component Operation
Refer to Paragraph 1-89.
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1-90. Between 25 and 30 Hours of Flight After Installation
Refer to Paragraph 1-90.
1-91. Each 50 Hours or 15/30 Days
Refer to Paragraph 1-91.
1-92.
100 Hours After Initial Installation of Tailboom
Refer to Paragraph 1-92.
1-93. Each 100 Hours
Refer to Paragraph 1-93.
1-94. Each 100 Hours or 3 Months, Whichever Occurs First
Refer to Paragraph 1-94.
1-95. Each 300 Hours or 3 Months, Whichever Occurs First
Refer to Paragraph 1-95.
1-96. Each 500 Hours or 12 Months, Whichever Occurs First
Refer to Paragraph 1-96.
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1-96A. Each 24 Months
Refer to Paragraph 1-96A.
1-96B. Deleted
Paragraph 1-96B has been Deleted.
1-97. Each 1200 Hours or 24 Months, Whichever Occurs First
Refer to Paragraph 1-97.
1-98. Hard Landing
Refer to Paragraph 1-98.
1-99. Sudden Stoppage - Power On or Off
Refer to Paragraph 1-99.
1-100. Overspeed
Refer to Paragraph 1-100.
1-101. Overtorque
Refer to Paragraph 1-101.
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1-102. Compressor Surge or Stall
Refer to Paragraph 1-102.
1-103. Lightning Strikes
Refer to Paragraph 1-103.
1-104. Magnetic Compass Malfunction
Refer to Paragraph 1-104.
1-105. Overhaul Evaluation Criteria
Refer to Paragraph 1-105.
1-106. Airworthiness Limitations Schedule
Refer to Paragraph 1-106.
Table 1-2. Airworthiness Limitations Schedule
Refer to Table 1-2.
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SECTION II. MAIN ROTOR HUB AND BLADE ASSEMBLY
2-1. Main Rotor Hub and Blade Assembly
Refer to Paragraph 2-1.
2-2. Description
Refer to Paragraph 2-2.
2-3. Removal - Main Rotor Hub and Blade Assembly
Refer to Paragraph 2-3.
2-4. Main Rotor Blades
Refer to Paragraph 2-4.
2-5. Description
Refer to Paragraph 2-5.
2-6. Removal - Main Rotor Blades
Refer to Paragraph 2-6.
Figure 2-1. Main Rotor Assembly
Refer to Figure 2-1.
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Figure 2-2. Grip Positioning Links
Refer to Figure 2-2.
2-7. Installation - Main Rotor Blades
Refer to Paragraph 2-7.
Figure 2-3. Removing Main Rotor Blades
Refer to Figure 2-3.
Figure 2-4. Main Rotor Blade Retention Bolt Extracting Fixture
Refer to Figure 2-4.
2-8. Preventative Maintenance - Main Rotor Blades
Refer to Paragraph 2-8.
2-9. Leading Edge Protection - Main Rotor Blades (Polyurethane Tape)
Refer to Paragraph 2-9.
2-10. Daily Inspection - Main Rotor Blades
Refer to Paragraph 2-10.
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2-11.
1000 Hour Inspection and Repair - Main Rotor Blades
Refer to Paragraph 2-11.
Figure 2-5. Main Rotor Blade Repair
Refer to Figure 2-5.
2-12. Conditional Inspection - Main Rotor Blades
Refer to Paragraph 2-12.
2-13. Inspection - Main Rotor Blades
Refer to Paragraph 2-13.
2-14. Field Repairs - Main Rotor Blades
Refer to Paragraph 2-14.
2-15. Trim Tab Replacement - Main Rotor Blade
Refer to Paragraph 2-15.
Figure 2-6. Trim Tab Replacement
Refer to Figure 2-6.
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2-16. Main Rotor Blade Splice Cover
Refer to Paragraph 2-16.
2-17. Installation - Main Rotor Blade Splice Cover
Refer to Paragraph 2-17.
2-18. Preservation, Storage, and Blade Packaging
Refer to Paragraph 2-18.
2-19. Main Rotor Hub
Refer to Paragraph 2-19.
2-43. Balancing - Main Rotor Hub Assembly
Refer to Paragraph 2-43.
Figure 2-34. Balancing Main Rotor Hub
Refer to Figure 2-34.
2-44. Installation - Main Rotor Blades
Refer to Paragraph 2-44.
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2-45. Alignment - Main Rotor Blades
Refer to Paragraph 2-45.
2-46. Installation - Main Rotor Hub and Blade Assembly
Refer to Paragraph 2-46.
Figure 2-35. Main Rotor Blade Alignment
Refer to Figure 2-35.
2-47. Torque Limits - Main Rotor
Refer to Paragraph 2-47.
2-48. Maintenance Operational Check - Main Rotor
Refer to Paragraph 2-48.
2-49. Tracking - Main Rotor Blades
Refer to Paragraph 2-49.
Figure 2-36. Rotor System Torque Limits
Refer to Figure 2-36.
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Figure 2-37. Tracking Main Rotor Blades
Refer to Figure 2-37.
Figure 2-38. Trim Tab Bender and Gage Application
Refer to Figure 2-38.
2-50. Spanwise Balance Check
Refer to Paragraph 2-50.
2-51. Chordwise Balance Check
Refer to Paragraph 2-51.
2-52. Autorotation RPM Check
Refer to Paragraph 2-52.
2-53. Collective Pitch Force Check and Adjustment
Refer to Paragraph 2-53.
Figure 2-39. Collective Pitch Force Adjustment
Refer to Figure 2-39.
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2-54. Main Rotor Hub Sealing
Refer to Paragraph 2-54.
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204P2100-101 AND
-103 MAIN ROTOR
BLADE ASSEMBLY:
FOR 205A MODELS (BHT-205A1-MM-1)
AND
FOR 205A-1 MODELS (BHT-205A1-MM-1)
CHAPTER 1. INTRODUCTION
1-1. General
Refer to Paragraph 1-1.
1-2. Helicopter Description
Refer to Paragraph 1-2.
Figure 1-1. Model 204A-1 Helicopter (Typical)
Refer to Figure 1-1.
1-3. Use of the Manual
Refer to Paragraph 1-3.
1-4. Bulletins
Refer to Paragraph 1-4.
1-5. Consumable Materials
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Refer to Paragraph 1-5.
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1-6. Special Tools
Refer to Paragraph 1-6.
1-7. Torques
Refer to Paragraph 1-7.
1-8. Terminology
Refer to Paragraph 1-8.
1-9. Warnings, Cautions, and Notes
Refer to Paragraph 1-9.
1-10. Use of Procedural Words
Refer to Paragraph 1-10.
1-11. Wear Limits
Refer to Paragraph 1-11.
1-12. Standard Practices
Refer to Paragraph 1-12.
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1-13. Replacement Parts and Assemblies
Refer to Paragraph 1-13.
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CHAPTER 4. AIRWORTHINESS LIMITATIONS
4-1. Airworthiness Limitations Schedule
Refer to Paragraph 4-1.
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CHAPTER 5. INSPECTIONS
Inspections
5-1. General
Refer to Paragraph 5-1.
5-2. Inspection Requirements
Refer to Paragraph 5-2.
5-3. Crash Damage
Refer to Paragraph 5-3.
5-4. Types of Inspections
Refer to Paragraph 5-4.
5-5. Definitions
Refer to Paragraph 5-5.
5-6. Inspection and Overhaul Tolerance
Refer to Paragraph 5-6.
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Scheduled Inspections
5-7. Scheduled Inspections
Refer to Paragraph 5-7.
5-8. Daily Inspection
Refer to Paragraph 5-8.
5-9. 100 Hour Inspection
Refer to Paragraph 5-9.
5-10.
1000 Hour Inspection
Refer to Paragraph 5-10.
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Special Inspections
5-11. Special Inspections
Refer to Paragraph 5-11.
5-12. Daily or Each 10 Hours of Flight Operation, Whichever Occurs First
until 250 Hours
Refer to Paragraph 5-12.
5-13. Between 5 and 10 Hours of Flight After Installation
Refer to Paragraph 5-13.
5-14. Each 8 Hours of Component Operation
Refer to Paragraph 5-14.
5-15. Each 25 Hours of Component Operation
Refer to Paragraph 5-15.
5-16. Each 25 Hours for the Next Four Inspections
Refer to Paragraph 5-16.
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5-17. Each 25 Hours of Component Operation or 15 Days, or Each 5
Days for Blades Operating in Salt Laden Atmosphere, Whichever
Occurs First
Refer to Paragraph 5-17.
5-18.
100 Hours After Each Installation
Refer to Paragraph 5-18.
5-19. Main Rotor Grip Ultrasonic Inspection
Refer to Paragraph 5-19.
5-20. Each 300 Hours of Component Operation
Refer to Paragraph 5-20.
5-21. Each 300 Hours or 3 Months of Component Operation
Refer to Paragraph 5-21.
5-22. Each 500 Hours of Component Operation
Refer to Paragraph 5-22.
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5-23. Each
600 Hours/6 Months of Tail Rotor Driveshaft Coupling
Operation
Refer to Paragraph 5-23.
5-24. Each 600 Hours or 12 Months of Component Operation
Refer to Paragraph 5-24.
5-25. Each 6 Months
Refer to Paragraph 5-25.
5-26. Each 12 Months
Refer to Paragraph 5-26.
5-27. Each 1000 Hours or 12 Months of Component Operation
Refer to Paragraph 5-27.
5-28. First
1000 Hours of Component Time and Each 3000 Hours
Thereafter of Component Time
Refer to Paragraph 5-28.
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5-29. Each 1200 Hours of Component Operation - Deleted
Paragraph 5-29 has been Deleted.
5-30. Each 1200 Hours or 24 Months, Whichever Comes First
Refer to Paragraph 5-30.
5-31. Each 24 Months of Flight Control System Bolt Operation
Refer to Paragraph 5-31.
5-32. Each 3000 Hours of Component Operation
Refer to Paragraph 5-32.
5-33. Each 3100 Hours of Component Operation
Refer to Paragraph 5-33.
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Conditional Inspections
5-34. Conditional Inspections
Refer to Paragraph 5-34.
5-35. Hard Landing
Refer to Paragraph 5-35.
5-36. After Blade Strike or Other Rotating System Torque Spike
Refer to Paragraph 5-36.
5-37. Sudden Stoppage/Acceleration - Main Rotor
Refer to Paragraph 5-37.
5-38. Sudden Stoppage/Acceleration - Tail Rotor
Refer to Paragraph 5-38.
5-39. Overspeed
Refer to Paragraph 5-39.
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5-40. Overtorque
Refer to Paragraph 5-40.
5-41. Compressor Stall or Surge
Refer to Paragraph 5-41.
5-42. Lightning Strikes
Refer to Paragraph 5-42.
5-43. Magnetic Compass Malfunction
Refer to Paragraph 5-43.
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Component Overhaul Schedule
5-44. Component Overhaul Schedule
Refer to Paragraph 5-44.
Table 5-1. Component Overhaul Schedule
Refer to Table 5-1.
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CHAPTER 6. DIMENSIONS AND CHARTS
6-1. Principal Dimensions
Refer to Paragraph 6-1.
6-2. Stations, Waterlines, and Buttocklines
Refer to Paragraph 6-2.
Figure 6-1. Principal Dimensions
Refer to Figure 6-1.
Figure 6-2. Station Diagram
Refer to Figure 6-2.
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CHAPTER 7. LIFTING AND JACKING
7-1. Lifting and Jacking
Refer to Paragraph 7-1.
7-2. Lifting the Complete Helicopter
Refer to Paragraph 7-2.
7-3. Lifting the Tailboom Only
Refer to Paragraph 7-3.
7-4. Jacking
Refer to Paragraph 7-4.
Figure 7-1. Jacking
Refer to Figure 7-1.
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CHAPTER 9. TOWING
9-1. Towing
Refer to Paragraph 9-1.
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CHAPTER 10. PARKING AND MOORING
10-1. Parking - Normal Conditions
Refer to Paragraph 10-1.
10-2. Parking - Turbulent Conditions
Refer to Paragraph 10-2.
10-3. Mooring
Refer to Paragraph 10-3.
Figure 10-1. Parking and Mooring
Refer to Figure 10-1.
10-4. Helicopter Storage
Refer to Paragraph 10-4.
10-5. Environmental Conditions
Refer to Paragraph 10-5.
10-6. Flyable Storage
Refer to Paragraph 10-6.
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10-7. Short Term Storage
Refer to Paragraph 10-7.
10-8. Intermediate Storage
Refer to Paragraph 10-8.
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CHAPTER 65. ROTOR SYSTEM
65-1. Rotor System
Refer to Paragraph 65-1.
65-2. Vibration Analysis
Refer to Paragraph 65-2.
65-3. Extreme Low Frequency Vibration
Refer to Paragraph 65-3.
65-4. Low Frequency Vibration
Refer to Paragraph 65-4.
65-5. Medium Frequency Vibration
Refer to Paragraph 65-5.
65-6. High Frequency Vibration
Refer to Paragraph 65-6.
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65-7. Main Rotor Troubleshooting
Refer to Paragraph 65-7.
Table 65-1. Main Rotor Troubleshooting
Refer to Table 65-1.
65-9. Operational Check - Main Rotor System
Refer to Paragraph 65-9.
65-10. Main Rotor Tracking
Refer to Paragraph 65-10.
Figure 65-1. Main Rotor Tracking Procedure
Refer to Figure 65-1.
65-11. Main Rotor Blade Vibration Check and Adjustment
Refer to Paragraph 65-11.
65-12. Main Rotor Blade Sweeping
Refer to Paragraph 65-12.
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65-13. Main Rotor Autorotation RPM Adjustment
Refer to Paragraph 65-13.
Figure 65-2. Lateral Vibration Check
Refer to Figure 65-2.
Figure 65-3. Rotor Smoothing Procedure
Refer to Figure 65-3.
Figure 65-4. Trim Tab Bender and Gage
Refer to Figure 65-4.
65-14. Main Rotor Hub and Blade
Refer to Paragraph 65-14.
65-15. Removal - Main Rotor Hub and Blade
Refer to Paragraph 65-15.
65-15A. Inspection and Repair - Main Rotor Hub and Blade
Refer to Paragraph 65-15A.
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65-16. Installation - Main Rotor Hub and Blade
Refer to Paragraph 65-16.
Figure 65-5. Main Rotor System
Refer to Figure 65-5.
Figure 65-6. Main Rotor Retaining Nut Damage and Repair Limits
Refer to Figure 65-6.
Figure 65-7. Main Rotor Cone Set Damage and Repair Limits
Refer to Figure 65-7.
65-17. Minimum Blade Angle - Main Rotor Hub and Blade
Refer to Paragraph 65-17.
65-18. Collective Pitch Forces - Adjustment
Refer to Paragraph 65-18.
Figure 65-8. Main Rotor System Torque Values
Refer to Figure 65-8.
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
Figure 65-9. Collective Pitch Retention Strap Adjustment
Refer to Figure 65-9.
65-19. Resetting Main Rotor Grip Tension-Torsion Strap
Refer to Paragraph 65-19.
65-20. Resetting Main Rotor Grip Tension-Torsion Strap - Initial Setting
Refer to Paragraph 65-20.
65-21. Main Rotor Blades
Refer to Paragraph 65-21.
65-22. Preventative Maintenance for Main Rotor Blades
Refer to Paragraph 65-22.
65-23. Main Rotor Blade Daily Inspection
Refer to Paragraph 65-23.
65-24. Nonrepairable Damage - Main Rotor Blades
Refer to Paragraph 65-24.
12902 South Broadway • Los Angeles, California 90061
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
65-25. Inspection and Minor Repair - Main Rotor Blades
Refer to Paragraph 65-25.
Figure 65-10. Main Rotor Blade
Refer to Figure 65-10.
65-26. Field Repairs - Main Rotor Blades
Refer to Paragraph 65-26.
Figure 65-11. Main Rotor Blade Repair
Refer to Figure 65-11.
65-27. Polyurethane Tape - Installation
Refer to Paragraph 65-27.
65-28. Deleted
Paragraph 65-28 has been Deleted.
65-29. Main Rotor Blade Paint Touch-Up
Refer to Paragraph 65-29.
12902 South Broadway • Los Angeles, California 90061
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
65-30. Main Rotor Blade Trim Tab
Refer to Paragraph 65-30.
65-31. Replacement - Main Rotor Blade - Trim Tab
Refer to Paragraph 65-31.
Figure 65-12. Trim Tab Replacement
Refer to Figure 65-12.
12902 South Broadway • Los Angeles, California 90061
Sheet 112 of 114 - HTC Proprietary Data Not to be Distributed
HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
HTC SPECIFIC INSPECTIONS
For 204P2100-101 Only: Main Rotor Blade Root End
Periodic Inspection Requirements
REQUIRED MATERIALS
1.
Naphtha or Rubbing Alcohol
2.
Kim Wipes or equivalent clean lint-free wipes.
3.
Bright Flashlight
4.
10x Magnifying Glass
INSPECTION INSTRUCTIONS
Within 25 Hours time-in-service (TIS) or 2 weeks, whichever occurs first, and
thereafter at intervals not to exceed 25 hours TIS or 2 weeks, whichever occurs
first, perform the following:
1.
Clean the upper and lower exposed surfaces of each M/R Blade from
an area starting at the Butt (Inboard-most) End of the Blade to three
(3.0) inches outboard of the Doublers.
2.
Use a 10X Magnifying Glass and Flashlight, visually inspect the M/R
blade parts for a crack or corrosion.
3.
If there is a crack, corrosion, an edge void, loose or damaged
adhesive squeeze-out, or an edge delamination, the Blade is Not
Airworthy and must be replaced with an Airworthy Blade before further
flight.
12902 South Broadway • Los Angeles, California 90061
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HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL
HTCM-006 UH-1H MAIN ROTOR BLADE
Change Letter: D
Change Date:
01/03/2020
4.
Record compliance with these inspections in the Rotorcraft Log Book
and/or in the Technical Directives and Bulletins section of the rotor
blade Serviceable Component Record, as applicable.
5.
For further information and rotor blade disposition, contact Helicopter
Technology Company, LLC (HTC) at (310) 523-2750, or FAX (310)
523-2745.
12902 South Broadway • Los Angeles, California 90061
Sheet 114 of 114 - HTC Proprietary Data Not to be Distributed

 

 

 

 

 

 

 

 

 

 

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