Feb 29, 1992
Accident
Substantial VERNALIS, CA
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 137
Probable Cause
THE OPERATOR'S FAILURE TO PROPERLY COMPLY WITH AN AIRWORTHINESS DIRECTIVE AFFECTING THE SECOND-STAGE TURBINE WHEEL ASSEMBLY. CONTRIBUTING TO THIS ACCIDENT WAS THE UNCONTAINED FAILURE OF THE SECOND-STAGE TURBINE WHEEL AND THE ROUGH/UNEVEN TERRAIN.
NTSB LAX92LA131