Jun 25, 1999
Accident
Substantial PACOIMA, CA
Injuries1 serious
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The pilot's improper valve adjustments and failure to follow the manufacturer's instructions, which resulted in a loose number 3 cylinder rocker arm and a loss of engine power.
NTSB LAX99LA236