No, it wasn’t an over boost issue. The Arcraft Maintenance Engineer/shop owner who sold me the airplane had a great story.. he told me that he had found a very small amount of metal in the oil, and that he had purchased the plane from the previous owner who didn’t want to deal with it. He said he pulled the cylinders and did the piston pin SB and the engine looked great. Very common cause of metal in Lycomings, he said. He said that he was sure it was a good engine. So I figured, sounds reasonable. After I bought it, however, two of his ex employees warned me that they had found substantially more than a “small amount” of metal and that they had told the shop owner the airplane should be grounded. That didn’t happen. The engine was reassembled and the plane was sold to me with a fresh annual inspection, fully “servicable”. I had already paid for the plane after hearing this revelation so I flew it for five hours and we pulled the suction screen (which is STEP NUMBER ONE in Lycoming’s SB describing what to do when metal is found in the oil). Well we found so much metal and crud jammed in there it was obvious the screen had never been removed. (Step number ONE, remember..) So we grounded the plane and pulled the engine for overhaul. They found one main bearing chewing itself up and the cam and lifters were pitted. “Well why no pre-buy inspection? Idiot?” you might say.. Well you’re not wrong, and I shoulda, but when you buy a plane from a licensed mechanic who does pre-buy inspections for a living and he signs it off as serviceable, there is or should be an expectation you are getting a serviceable airplane. I was wrong to expect that. Chalk it up to one really expensive life lesson. But at least I have an engine I now KNOW is dependable.
And that’s all I’m sayin about that. For now.