Guys, this is an academic discussion . I am following TCAS from the ATC side since its introduction, and I have never seen or heard of an RA that , if followed would have resulted in an accident , even with initial version 6.04 which was quite bad.
But there are almost a hundred cases by now where not following and manoeuvring against it caused loss of separation , and even a collision ( Ueberlingen)
Anyway the future will solve this , on the A380, A350 (and I believe on all the neos but not 100% sure ) the ACAS is embedded in the Flight Director , so RAs are automatically flown by the auto pilot.
Of course there is a button to disconnect , but I have never heard of anyone doing that in real life. Crew operating those aircraft in their vast majority praise the system .
learner001 : just saw your post ; 100% with you there . Good reminder !
Last edited by ATC Watcher; 11th Nov 2016 at 15:39.
Reason: new post from learner001