Apparently some of you work for more well-heeled organisations than I do.
Send me dirty messages and tell me what it feels like.
QEC? What's a QEC? Is that some sort of code for, "take every damned thing off including wiring harness and quickly throw it on the other engine." ?
Throw in finding damaged generator drive shafts, tach-gens, etc. , no spares and then scheduling the whole thing during a summer long weekend with everyone away and you've a recipe for a six day change.