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Old 7th Apr 2012, 02:22
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CONF iture
 
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Originally Posted by Diagnostic
Therefore my hypothesis is that the stall warning was being deliberately ignored as they (especially PF) thought it was a malfunction, as part of the same instrumentation problem which was affecting the IAS.
I do share that view, and there could be part of the reason in the OSV info on unreliable airspeed indication received by all AF pilots 6 months before 447 (third Interim Report).




The mention STALL warning is made in a way that it does not deserve specific attention and could almost be disregarded (my own interpretation of the memo)
6. Spurious or persistent STALL warning
When you read the memo, it does seem normal to have to deal with a continuous STALL warning without taking any necessary action ...





What to say about the recommandations :
2. Do not panic - Be in control.

At default to specifically train in the simulator, that memo should have stated the necessary steps :
  1. PF Maintain 2.5 degrees of pitch
  2. PNF Set the thrust parameters as they are usually in CRZ
  3. Wait for improvement

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