TCAS Reversals
Just a few observations:
If, as reported above, the t154 left its level 25 seconds before collision, then that would have been just a few seconds after the B757 responded to its RA. Almost a worst case 'RA Reversal' Scenario.
Can anyone state categorically the TCAS fit on these aircraft?
Particularly Version numbers?
It is a not well known, but very important fact, that TCAS versions prior to 7 can not reverse when the RA is coordinated.
i.e. if either aircraft manoevres against the RA then you are both in big trouble.
Thats one of the reasons that the JAA ACAS mandate only deems v7 to be acceptable.
Is anyone still operating on v6.04 grandfather rights? If you don't know, ask one of your avionic engineers.
CPB