Witmo
Pattern Altitude
- Joined
- Feb 19, 2006
- Messages
- 2,379
- Display Name
Display name:
Tim
Pilot heard a noise sounding like a backfire about 3K agl after takeoff. Landed and parked it for me to look at. Didn't sound like any afterfire I'd ever heard so I grounded airplane pending investigation. Found four studs of the eight holding the #1 cylinder on the Lycoming O-360 had sheared off. The engine had less than 50 hours SMOH.
Other than mis-torqueing the nuts, does anything else come to mind that would cause the studs to break? Engine was running fine up til then. Airplane is used to tow gliders and this happened on the eighth tow of the day.
Other than mis-torqueing the nuts, does anything else come to mind that would cause the studs to break? Engine was running fine up til then. Airplane is used to tow gliders and this happened on the eighth tow of the day.