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FLIGHT CREW TRAINING MANUAL ABNORMAL OPERATIONS NAVIGATION 03.034 JAN 09/07 Ice accretion due to pitot heat failure, orpitot obstruction due to foreign objects.Obstructed drain holes. Total pressure blocked.Constant IAS in level flight, until obstruction is cleared. In climb, IAS increases.In descent, IAS decreases. Abnormal AP/FD/ATHR behavior :a) AP/FD pitch up in OPN CLB to hold target IAS.b) AP/FD pitch down in hold target IAS Total obstruction of static ports on ground. Static pressure blocked at airfield level.Normal indications during T/O roll.After lift-off altitude remains constant.IAS decreases, after lift-off.IAS decreases, when aircraft climbs.IAS increases, when aircraft descends. The above table clearly illustrates that no single rule can be given to ADR CHECK PROC / UNRELIABLE SPEED INDICATION QRH PROCEDURE R MSN 0002-0860 R (2) INTRODUCTION The ADR CHECK PROC / UNRELIABLE SPEED INDICATIONS procedure has It includes the following steps: 1. Memory items 2. Trouble shooting and isolation 3. Flight using Pitch/thrust references. WHEN TO APPLY THIS PROCEDURE? ENV A330/A340 FLEET FCTM Page 4 of 11 |