Originally Posted by
Bula
Tdracer,
I'm just using your numbers. So that would be IFSD of 1 per 1.4 million hours on the 787 in general.
Anyway, there have been 19 shutdown inflight since 2013, which would make it worse.
So if 400 aircraft have done 5 million hours (10 million engine hours), that would be 1 IFSD every 530000 hours on round figures taking 747-8 hours into account, or am I missing something?
Bula, you're missing the point. The IFSD requirement for 180 minute ETOPS is .02/1000 hrs. - or 20 shutdowns per million hours. To be clear, that means, on the average, one shutdown every 50,000 hours. The 787 fleet is roughly 10 times
better than that requirement.. It's actually on a par with "mature" engine fleets such as the CF6-80C2, GE90, PW4000, and pre-1000 Trent.
So what's your beef? If you feel the 787 shutdown rate is a problem, then you have the
same issue with the 737, 757, 767, 777, A320, A330, and any other twin engine aircraft that flies ETOPS...
BTW, the GEnx-2B on the 747-8 are book kept separately - that would be another ~5 million engine hours - with a similarly low shutdown rate (the gearbox problem that has caused several shutdowns on the GEnx-1B is unique to the -1B).