TBO Question
Thread Starter
Joined: Apr 1999
Posts: 91
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From: Canada
TBO Question
In a recent discussion the subject of "Time between overhauls" came up as it pertains to modern jet (turbofan) engines.
My knowledge is pretty thin but I believe current monitoring equipment allows leaving the engine on the wing until the monitored parameters reach limits that require removal as opposed to the old "hard hour number" for overhauls based on past performance of the engine type and operating regime.
If this is correct can anyone provide representative numbers for the modern engines as to how long they typically operate before being removed? I recall an item a few years ago about a very high time engine (GE I think) that was up into the 20 or 30K range.
Thanks in advance.
My knowledge is pretty thin but I believe current monitoring equipment allows leaving the engine on the wing until the monitored parameters reach limits that require removal as opposed to the old "hard hour number" for overhauls based on past performance of the engine type and operating regime.
If this is correct can anyone provide representative numbers for the modern engines as to how long they typically operate before being removed? I recall an item a few years ago about a very high time engine (GE I think) that was up into the 20 or 30K range.
Thanks in advance.
Joined: Feb 2005
Posts: 4,581
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From: flyover country USA
...can anyone provide representative numbers for the modern engines as to how long they typically operate before being removed?
Operating cycles -- startup, TO, climb, cruise, descent/landing, R/T -- are a better measure of wear & tear than sheer flight hours. The longhaul operator will obviously accumulate more hours.
A long time ago the DC-3 operator I worked for had a devil of a time getting R-1820's to run 1200 hrs!
