TBO is a rather cupreous number. If you were in part 135 you can petition
the FAA for a 10% (IB) extension in the TBO hours if all the parameters are
good. That is how the manufacturers get longer recommended TBOs.

"Scott" wrote in message
...
I'm not sure what you base your assumption that it will NEED
replacement/rebuilding shortly. My old Chief had 2400 hours on its C-85.
Compressions were well into the upper 70s. I have a friend who flew
Citabrias to 10000 hours between overhauls. The key to that long of a
life was useage. They used them for power line patrol and flew 10-12
hours daily. He believed the key to longevity was usage. Sitting unused
it what kills these engines...TBO is RECOMMENDED, unless it is used in
commercial operations, where it's required.

Scott


Steve Foley wrote:
Yup. It's run out, and will need replacement/rebuilding shortly. Like you
said, anything else is gravy.

Don't you have a T-Craft engine?

"Michael Horowitz" wrote in message
...

I have a lead on a Tcraft with an A-65 engine that has exceeded
recommended TBO. It is my understanding the compression is still good.

How should I approach this engine ( i.e. just assume everything over
1800 hours was a freebee and there is no guarantee it's not about to
poop out)? - Mike