Quote by IGh:
There were at least two fatal RA-induced upsets
If they really did that, it's not the fault of TCAS. TCAS evasive maneuver do not call for abrupt procedure. In fact, TCAS reactive procedure are very smooth, you deviate from the original altitude only a little. Lateral maneuvers are not required.
But you can abuse every system. Those pilots didn't do their job correctly.
Anyway, what has it to do with the topic? It's about calling ATC.
Dani