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Old 25th Jul 2004, 13:13
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mikemal
 
Join Date: Jun 1999
Location: Perth, Australia
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To RA or not to RA

Hello all (CJ Driver inn particular!)

A question please. Most aircraft manufacturers have as a standard procedure that the TCAS should be changed to "TA only" when you have an engine failure (even 4-engined aircraft).

I have a problem with that for a number of reasons. The type I fly is an A340, and this aircraft does not have a performance problem that would limit the climb in the event of a "climb" RA (50% chance of a descent command anyway!).

In addition, the flight control laws prevent the aircraft from stalling.

Airbus insists that the "other aircraft" will manoeuvre based on your TA signal, ans the S band signal tells the other aircraft you are on TA only. My argument is that in Africa, perhaps 10% of the aircraf have TCAS, thus limiting this argument.

Am I missing something in being uncomfortable setting up TA ONLY in a tricky environment?

Thanks
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