vilas;
Re, "Thanks. I will look for older posts. ",
The following link to a PPRuNe search engine may be of assistance:
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The UAS discussion is interesting.
A change in pitch attitude at cruise altitude destabilizes a stable airplane and so should be a consideration before executing the UAS memorized items which require an initial pitch change where none is required.
Establishing a 5° pitch would mean an increase of about 2.5° to the cruise pitch attitude...not destabilizing right away but would be if held too long.
The remarks in FCTMs, (Flight Crew Training Manual(s)) indicate that:
ADR CHECK PROC / UNRELIABLE SPEED INDICATION QRH PROCEDURE
The flight crew may enter this procedure, either upon ECAM request (ADR DISAGREE or ANTI-ICE PITOT caution), or because he suspects an erroneous indication, without any ECAM warning.
When to Apply this procedure
1, 2, 3, etc;
5. 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.
6, 7, etc
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. Once the target pitch attitude and thrust values have been stabilized, as soon as above safe altitude, the flight crew will enter the 2nd part of the QRH procedure, 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.
(Note: SOPs published, early 2007)
The subject is discussed widely on many of the previous 10 threads. Some further discussion is available
here, and on this thread,
here.