Originally Posted by
rickair7777
ETOPS accounts for engine out plus unpressurized cruise at 10k to the divert field. No engine/pack combo could maintain cabin pressure with a window out.
ETOPS does not account for excess drag due to structural failure... that would probably not work out with typical fuel loads.
And I’ll add for clarification that the engine failure and decompression are planned at equal time point. Blow an engine and lose cabin pressure just as you arrive at the ETP, descend to 10,000’ and fly on one engine all the way to your ETOPS alternates.