The guy might have run 100LL and stuck a valve, prompting a top overhaul
and installation of 100 Octane valves. What year was the major done?
It might have been 1965 and only flown those 400 hours over the past 40
years. No use can be harder on the engine than abuse...

Scott


Michael Horowitz wrote:
Subject is part of a description of an A-65 engine.

Am I reading this correctly: the engine had a major, then about 400
hours later required a top half overhaul?? Isn't a top included in a
major?

What likely happened? - MIke