A320 Questions

[320p]

Hi, Two questions.

1. ENG 1(2) STALL(PRO-ABN-70 P 27/76) mentions :
ASSOCIATED PROCEDURES
ENG 1(2) SHUT DOWN
Apply the ENG SHUT DOWN procedure (Refer to PRO-ABN-70-I ENG 1(2)
SHUT DOWN).
Engine restart at crew discretion.

Request clarify circumstances and conditions which would justify "Engine restart at crew discretion", after an Engine stall indications .

2. Unreliable Speed Indication/ADR check procedure(PRO-ABN-34 P 53/60) :
mentions:
If affected ADR(s) cannot be identified, or if all ADRs are affected:
ONE ADR......................................................... ......................................................KEEP ON
Keep one ADR ON to maintain the STALL WARNING protection.

Why is one ADR is required ON for stall warning protection?.

Thanks

[Field In Sight]

Consider restarting the engine if the other engine is having problems also.

The ADR processes the angle of attack info to give the stall warning.
Although you would be disregard the speed information.

[CEJM]

2) Angle Of Attack is required for Stall Warning, hence why keeping one ADR on as one of the ADR inputs is the AOA.

[Checkboard]

Request clarify circumstances and conditions which would justify "Engine restart at crew discretion", after an Engine stall indications .

If you need the performance of that engine - typically if you have a problem with the remaining one! (But also if you were going to make an approach into an airport with terrain issues.)

[gAMbl3]

You may also consider Engine restart if Stall has occurred due to reasons other than LPCBV and or VSV failure.

[vilas]

　

If possible, restart
If the engine has failed or flamed out, and there is no indication of engine damage, it is always possible to attempt to restart the engine.

Engine damage can be suspected if some of the following symptoms are observed: • Rapid increase of EGT above the red line • Important mismatch of rotor speeds (N1 vs N2 or N3) or absence of rotation.

• Abnormal oil pressure/temperature

• Loud noise • Fumes or burning smell in the cabin. If a visual check is possible, the crew should look for damage to the engine cowling or aircraft structure, or missing engine parts.
Reproduced from:
Flight Operations Briefing Notes. Supplementary Techniques.
Handling Engine Malfunctions.