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Old 5th Apr 2011, 13:26
  #3022 (permalink)  
takata
 
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@takata: Eh bien, you're right the timestamp of the ACARS message is not necessarily related to when the fault occurred. The sequence of events up to the ADR disagree message however would be conducive with a disabled pitot and the corresponding crew action such as manual AP OFF.
AP OFF was certainly not due to manual action: AP was switched OFF by the system, hence, this relevant ACAR was sent (no ACAR would be sent if this was due to a manual switch). It means that before this point, AP was still ON, and after this point, it was automatically switched OFF because ALT2 was triggered (hence, because ADR disagree due to pitot errors)...
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