Graybeard
Given that the sequence of ACARS reporting is indistinct, and attitude is a parameter for TCAS antenna sequestering, what of IRU moaning has to do with its (TCAS) fault? Loss of attitude management could even explain the a/p trip. Turbulence? FCPC? TCAS fault is not inexplicable.
Holding ACARS loosely, which I do, a genesis of fault reporting could begin while 447 was "on flight path" and the "last reported" position may have been an accurate record of several minutes of heading, altitude, airspeed discrepancies contributing to an upset.
Why hold ACARS loosely? BEA included only the data originally leaked to France2. Essentially, granting it provenance.
Fair enough, but why then withold the "remaining" data?? (FromRobin42, above).
If one takes ACARS (the system and this specific data) with a grain of salt, there would be fewer "theories" to be bolstered by "FDR style" "official" data that comes from a maintenance tool, ACARS.
Last edited by Will Fraser; 17th July 2009 at 14:21.