May 1, 2019
Accident
Substantial Upland, CA
Injuries1 serious
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The pilot’s improper installation of the No. 3 cylinder valve cover, which resulted in an oil leak, oil starvation, and a subsequent total loss of engine power.
NTSB WPR19LA129