Feb 25, 2024
Accident
Substantial Watertown, SD
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The stuck No. 2 cylinder exhaust valve, which resulted in a partial loss of engine power and a forced landing due to an undersized exhaust valve guide. Contributing to the accident were the improper manufacture of the engine cylinders, and the operation of the engine in an overly rich fuel condition.
NTSB CEN24LA121