Jan 21, 1989
Accident
Destroyed BRIGHTON, MI
Injuries1 serious, 1 minor
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
INSTALLATION OF AN IMPROPER OIL DRAIN VALVE BY OTHER MAINTENANCE PERSONNEL AND THEIR FAILURE TO FOLLOW THE APPLICABLE AIRWORTHINESS DIRECTIVE (AD 81-11-02/R1), RESULTING IN SUBSEQUENT INTERFERENCE BETWEEN THE LANDING GEAR AND OIL DRAIN VALVE. THIS CAUSED THE VALVE TO MOVE OPEN & LEAK, WHICH RESULTED IN THE LOSS OF ALL ENGINE OIL.
NTSB CHI89DEC02