Hi BananasB
Thanks for your answer. Of course you are correct about the performance constraints. This is understood, and the hypothesis has ben tested in our simulator. Looking at the maximum deviation commanded by the TCAS II, it looks like we can comply with an engine out, even at 2000' above max recommended altitude with one engine inop.
One other reason Airbus gives for their rationale is "fleet commonality", and we take this to mean the mix of Fly-by-wire and non- FBW aircraft. This does not affect us, flying just the 340.
To answer your question, we have been battling to try and ascertain whether performance is taken into consideration by the TCAS, and have no conclusive evidence from either the manufacturer not the TCAS vendor.
However, Airbus, in one of their conferences, confirmed that the TCAS can command a climb through max alt without any repercussions (FBW aircraft).
Hope this helps.
Mike
Hi Ibthesius
One problem we have with the rationale to let the other aircraft do the manoeuvre is that 90% of our conflicting traffic will not be fitted with TCAS, so they will not get out of your way.
This leaves two alternatives - one, try to visually acquire the traffic (IMC?) - not recommended by Airbus, or get flown into by the other aircraft.
IN addition, in the Quick Reference Checklist (QRH), Airbus states "Do not manoeuvre based on a TA alone". This has severe repercussions, asn any manoeuvre based on a RA would be in contravention of AIrbus emergency procedures.
Tricky!