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IO-540 mystery
Our club's PA32R-300 has an IO-540 with lots and lots of hours on it.
After 20+ years, at this year's annual the compression was down a few pounds on a couple of the cylinders, and the mechanic said he really has his doubts about it passing next year's annual. That might be significant, or it might not. Twice this year, while people have been flight training in it (I was doing a BFR this spring, another pilot was checking out in the plane for the first time a few weeks ago), the engine has been running fine and on rollout afterwards the engine died and couldn't be restarting. Both times it was after doing some air-work (stalls, steep turns, etc) and then a couple of touch and goes. Nobody has had any problems in a normal point to point flight, although we've had the normal problems with hot starting that's endemic to fuel injected aviation engines. The last time it happened, the engine died at the airport where our mechanic is based, and he pulled the plugs and said they weren't fouled and they were dry (so the problem restarting wasn't that he flooded it). Based on a suggestion here, I had them check the fuel pressure, and it seems fine. Could it be vapour lock? Any other suggestions? -- Paul Tomblin http://blog.xcski.com/ "Once you have an emergency, the airplane belongs to the insurance company. Concentrate on saving people on the ground, your passengers, and yourself, in that order. Saving the plane is not on the list." |
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