I have had 3 partials only - in a couple of thousand hours!
1) A run-in with carby icing in a PA28, way back - uneventful restoration of noise
2) Core fell out of a spark-plug in a PA38 and got chewed up in one pot, just after turning X-wind on climbout with a student pilot flying - uneventful return to rwy.
3) Turbocharger on a C402B crapped itself on TO from Rwy 01 YBTL with a full load of punters during the airline pilots strike - big spike in my heart rate and tear-drop turn over water for a return onto Rwy 19 - fire engines and the whole deal!
I have just clocked 600 hrs in the FTDK - 88,000 nm = 4 x round the world - hasn't missed a beat!
Dr 