Just to reiterate a point I made in previous threads about this accident:
Please remember to differentiate between:
(a) Not complying with an RA.
and
(b) Manouevering in the opposite sense to an RA.
There are circumstances where not complying an RA may be necessary. This is recognised by manufacturers and authorities and hence final authority to follow or disregard an RA rests with flight crew.
However, manouevres in the opposite sense are forbidden.
Excluding the circumstances preceeding the TCAS event itself, this accident was NOT caused by the failure of the T154 to follow its RAs.
It was caused by the T154 manoeuvering opposite its RAs, not just once, which the strengthened 'Increase Descent' RA issued by the B757 would probably have dealt with, but twice.
Anyone that thinks I am splitting hairs is missing the point. The golden rule of surviving a TCAS event is 'Don't Manoeuvre Opposite'.