What is the lifespan on a Rolls Royce Rrent 1000 engine and a General Electric GEnx?

i already know the lifespan of a aircraft but not of the engines on the aircraft help|||There is no such thing as a Rolls Royce Rrent 1000 engine. And the General Electric GEnx engine is a modular design which has been engineered such that individual modules each have their own overhaul schedule.|||It's basically unlimited as has been the case for most turbine engines built in the last 50 years. Engines get replaced only when it's not cost effective to maintain them when newer more efficient engines become available, unless an engine suffers catastrophic damage.



As a precaution older engines were overhauled based on hours of operation or cycles not whether they actually needed any work done which resulted in a lot of unnecessary work. Most of the newer engines have very few of hour or cycle limits. Almost all the new engines now have computer engine life recorders which monitor numerous engine parameters to determine when an engine needs work and what needs to be done. The technical term is engine maintenance happens "on condition". They're very much like the check engine light in your car. Of course, if the pilots notice something they don't like they call maintenance.|||The entire engine is pulled at a factory specified interval %26amp; sent back to the factory for rebuilding. This happens weather there is a problem or not, strictly based on the flight time of that engine. So, basically, it will go as long as parts are available.