TCAS Fail Unrelated to Other Faults
Thanks for the translation of the TCAS Fault message, h3dxb. Now, let's see if your manuals can confirm or refute the following:
Ref: "There are five official, damning reports on A330 and A340 aircraft operated by major airlines suffering complete failure of all flight instruments in flight. Pitot probes iced up in meteorological conditions at night, by day, in cloud and in clear air."
The early failures reported by AF447 ACARS all seem to be explainable by iced pitot tubes, save for the TCAS Fail. TCAS does not use airspeed, just altitude via the transponder.
Air data Altitude failure will cause the transponder to revert to Mode A. I'm not sure if it would report failure of its altitude input to the CMS/ACARS, but it didn't report a Fault.
Transponder reversion to Mode A will not cause a TCAS Fail condition, but a TCAS OFF condition.
Therefore, we have a TCAS Fault that occurred nearly simultaneously with the airspeed sourced faults, but unrelated.
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GB