Does an overhaul un-lemon an engine?

On Mon, 09 May 2005 15:38:19 -0400, xyzzy wrote:

No Spam wrote:

On 5/9/05 11:56, "xyzzy" wrote:


If an engine has been overhauled 3 times, never making TBO either time
(not even making it to 1/2 of TBO 2 of the times), should I be concerned


In this case, it was first owned by a flight school that put 1000 hours
on it in 2 years and then overhauled it. Then it was sold to someone
who owned it for 40 years, went long stretches without flying it, and
went an average of 400 hours and 15 years between overhauls (including a
top). It was major-overhauled in 2003, about 40 hours put on, and then
sold to the current owners in 2004 who put about 50 on it in the last
year. I'm considering buying in with them. Sounds like the consensus
is that it's how good the last overhaul is, and how well it's been
treated since, that matters, and what it did before the last overhaul is
less important.

TBO is measured in both hours of operation -or- calendar time. 12
years is the recommendation for many engines, so if that is the case
for this engine, the engine made it to TBO each time.

-Nathan