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? Rely on the stall warning that could be triggered in alternate or direct law. It is not affected by unreliable speeds, because it is based on angle of attack.
? Depending on the failure, the OVERSPEED warning may be false or justified. Buffet, associated with the OVERSPEED VFE warning, is a symptom of a real overspeed condition.
6. Inconsistency between radio altitude and pressure altitude.
7. Reduction in aerodynamic noise with increasing speed, or increase in aerodynamic noise with decreasing speed.
8. Impossibility of extending the landing gear by the normal landing gear system.
 
ABNORMAL OPERATIONS
NAVIGATION
 
HOW TO APPLY THIS PROCEDURE?
 
Because the displayed information may be erroneous, the flying accuracy cannot be assumed. Incorrect transponder altitude reporting could cause confusion. Therefore, this is an emergency situation which requires to land as soon as possible, and a MAYDAY should be declared to advise ATC and other aircraft of the situation.
PART 1: MEMORY ITEMS
If the safe conduct of the flight is affected, the flight crew applies the memory items. They allow "safe flight conditions" to be rapidly established in all flight phases (takeoff, climb, cruise) and aircraft configurations (weight and slats/flaps). The memory items apply more particularly when a failure appears just after takeoff.
 
ABNORMAL OPERATIONS
NAVIGATION
 
Once the target pitch attitude and thrust values have been stabilized, as soon as above safe altitude, the flight crew will enter the QRH abnormal procedures, to level off the aircraft and perform trouble shooting. This should not be delayed, since using the memory item parameters for a prolonged period may lead to speed limit exceedance.
PART 2: TROUBLE SHOOTING AND ISOLATION
GENERAL
If the wrong speed or altitude information does not affect the safe conduct of the flight, the crew will not apply the memory items, and will directly enter the QRH abnormal procedures. Depending of the cause of the failure, the altitude indication may also be unreliable. There are however, a number of correct indications available to the crew. GPS altitude and ground speed are available on MCDU GPS monitor page and RA may be used at low level.
For affected ADR (s) identification, the flight crew may, either level off and stabilize the flight using the dedicated table in PART 2, or, if for instance already stabilized in climb, use the CLIMB table given in part 3. The trouble shooting will be more accurate, using the level off table.
LEVEL OFF AND STABILIZATION (IF REQUIRED)
The table gives the proper pitch and thrust values for stabilization in level off according to weight, configuration and altitude.
It must be noticed that, if the altitude information is unreliable, FPV and V/S are also affected.
In this case, the GPS altitude, if available, is the only means to confirm when the aircraft is maintaining a level. When reliable, the FPV should be used.
　
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本文鏈接地址：A330/A340 機組訓練手冊 FCTM Flight Crew Training Manual 2(46)