I thought TCAS
was mandatory? Or is the Citation too small
Of course the bigger question is why the Turkish didn't "follow the commands" of its TCAS. Obviously the lessons of Uberlingen (sp?) have not been learned by everyone.
Controversial, and I've not read the report yet, and I appreciate the errors by the controller and Citation crew were the first two holes in the cheese .... but why are crews of a MAJOR airline still disregarding TCAS? I share this airspace with them - I expect them to abide by the rules.
Tin hat on.
A4
Ok, I've skimmed the report - not a nice scenario to be presented with. A "crossing descend" followed by "increase descent", followed by "climb" with a controller request thrown in for good measure but it does seem the increase descent was as a result of not following an initial TCAS instruction.
Link to report:
Air Accidents Investigation: Citation 525, D-ITAN and Boeing 777 300ER, TC-JJA