(If in the cruise):
Avoid impact
When back on ground, consider, changing TCAS, alternative line of work - burning licence getting seriously drunk.
If on approach, then answer = Yes. and TCAS RA unless both aircraft are going away from each other, even without RA for whatever reason you would have already taken avoiding action - admittedly not as dramtically as above, you should study TCAS its a great subject.
Last edited by Natstrackalpha; 23rd Apr 2012 at 14:40.