Hi,
After worsening conditions: WX then ice crystals, obsolete AS sensors failing simultaneously, "law change", non trained (to this situation) PF applying large SS inputs at high FL, etc. one may ask:
The lack of reliable info during so many time together with non reliable SW and other factors (noise, alarms, etc.) are to promote, GRACEFUL DEGRADATION of the "effective aircraft" (System+PF) or are a recipe for ACCELERATED DEGRADATION? Stressing HF, etc. Actually their fate was sealed VERY FAST.
It seems like exactly when they needed most reliable resources,( e.g. good man-machine interface to allow them to do just the very basic: aviate.) their inputs (mainly the input to PF) were sub standard (lacking, intermittent and perhaps, misleading). This probably will be understood by summer.
PS
mm43:
his "inputs" rejected the visual evidence in favour of the cockpit vibration and unusual noise actually being what he "expected" in a high speed situation.
We have to check carefully the timing.
The attitudes of PM and later CPT are coherent with "lack of enough info.". Like being unable to do any better, despite some moments briefly raising some "not so strong questioning". Seeming (with available info. we have) more doubts than what would be required to act with confidence.
