ADR and TCAS
Graybeard:
"So why wasn't there an ADR Fault transmitted at 0210, if that were the source of the TCAS Fault as you say?"
First, we are not sure of the sequencing logic of the faults on the ACARS messages. Is it really time sequence? or perhaps does it reflect the ECAM logic ?
Second, the sequencing logic of the ECAM is not a time sequence but an order of priority.
It seems to me that it is very possible that the ACARS sequencing logic follows the ECAM logic (to be confirmed by an engineer)
AP OFF, the first message one at 2:10 is a Master warning, and would be on top of the list on the ECAM !
Flags on PFDs would show up early on.
In other words, if the ACARS messages are listed as on the ECAM, at 2:10 all the secondary faults show up, the NAV ADR DISAGREE would be on top of the master cautions, as it is the "deepest fault", reporting on the ACARS message in the end !
It's a bit puzzling but the whole thing points to a pitot failure of all pitots at the same time practically. (which makes sense if they are all of the same making, all with the same design problem, all fail within the same conditions)
Including STBY for the ISIS !
ALT Law requires failures of 2 ADRs That's also when you get flags on PFDs.
Lastly, only a failure of ALL ADRs will trigger the associated TCAS inop. !!
On this: ADRs feed ATC box "w/ airspeed, Mach and V/S upon ground request" (from FCOM)
What's missing is the "WINSHEAR Prediction system Fault" and GPWS TERR Fault!! what happend to those ?? Because they should be right there along with the other faulty stuff associated....
Anyway, as you can understand by now, I don't buy any stuff about TCAS antenna broken and so on.
Cheers.