Maintenance hangar

[guillaume78150]

The Comanche has now 250 hours on the clock. After a visit in the maintenance hangar, engine is fine, compression test ok but it reports "... core not bad...".
It looks a bit neutral. Former visits reported "Like new" or "Great shape". Time for a complete overhaul? And is there a way to overhaul without resetting the clock to "0"?

[A-26Invader]

Overhauls for horizontal engines should be anywhere between 1700 and 2000 hours..... more or less. 250 hours means you are doing something wrong with power management while flying. Overhauling an engine will not reset airframe hours but it will reset the engine time.

[AKar]

Even if doing something seriously bad, they may last for 2000 hours...or die withing fifty if doing all optimally.

-Esa

[Nick - A2A]

I don't think the "core not bad" means it's time for an overhaul anyway. Just a warning that the values which Accu-Sim uses to keep track of the engine's condition are no longer optimal. I think they vary the notes a bit too, so for example one day the mechanic might write "core ok" and the next it might be "fair shape", but mean the same thing.

When it is time for overhaul, I think the notes will be pretty clear on the matter!

Cheers,
Nick

[guillaume78150]

Reports indeed varied from "Like new..." to "Fair shape..."
Strange, I always fly it the same way, parameters in the green range, 2000/2200 RPM, 20/24 In manifold pressure, regular oil change, etc.