



Had this 28-140 in for a 100 hour inspection when I found low compression on cylinders 1 and 3. Stuck a borescope in and found the exhaust valves had been burnt despite being replaced 100 hours previous. Swapped the pistons and cylinder with new millenniums and she’s been running like a watch ever since.
I haven’t seen any other A&P posts so I figured I’d drop one. I have plenty of pictures and stories of anyone would like more.