Originally Posted by
Ultralights
part of the aircraft ETOPS certification is also a lot strickter maintenance regime, with rules like both engines cannot be changed within a certain flight time period of each other etc etc.
A little bit of interesting info....
One of the requirements for granting ETOPS approval at service entry is that the manufacturer will have performed a 3000 cycle test on the engine and then stripped the engine down and carried out a detailed examination.
RR has yet to do that for the Trent 7000 as of late last year resulting in 180 minute ETOPS with a 500 cycle limitation on the engines and an ETOPS expiry date of year end for full compliance.