Mr AirNZ From New Zealand, joined Feb 2002, 765 posts, RR: 1 Reply 1, posted (10 years 9 months 2 weeks 1 day 8 hours ago) and read 1407 times:
I cannot tell you how long an engine will last but I can assure you they do not last anywhere near as long as the aircraft itself. In an aircrafts lifetime it will experience numerous engine changes. Prehaps someone could give some figures?
Wilcharl From United States of America, joined Jun 2000, 1158 posts, RR: 3 Reply 2, posted (10 years 9 months 2 weeks 1 day 7 hours ago) and read 1370 times:
they do not last as long as the plane... that means when i see a 707 flying... those engines are still in production. I think not... an engine is overhauld at its TBO, if you want a detailed answer i would suggest asking the tech-ops forum, but do a good thorough search before you do
Wilcharl From United States of America, joined Jun 2000, 1158 posts, RR: 3 Reply 7, posted (10 years 9 months 2 weeks 9 hours ago) and read 1145 times:
an engine change does not warrent a new engine. to keep it simple in this forum lets look at a car engine (a recripciating v-8) when the enigne fails at the end of its useful life it is rebuilt or "remanufactured" (remanufactured often constittues a higher level of new parts etc..) the cylinder walls are machined as are the heads. the valves are resurfaced, new pistons are installed. new bearings all the way around. all "wear items" are replaced it is not a new engine... now an aircraft engine to be considered remanufactured and have a new log (we are talking about recips here in GA) it requires the engine to be factory remanufactured and has a certain criteeiea (a matitutuck engine is not "remanufactured") Pratt stoped making the JT8-D sometime back. wehn those engines die. they will be overhauled and continued to use over and over and over again unless there is a catastrophic failure or the supply of servicable parts runs out