Mar 7, 1989
Accident
Substantial CUSTER, SD
Injuries1 serious
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
THE IMPROPER MAINTENANCE BY THE PILOT IN COMMAND/OWNER IN THAT THE MAGNETO DRIVE GEAR RETAINING NUTS WERE NOT SAFETIED WHICH RESULTED IN THEM BACKING OFF, DISCONNECTING THE MAGNETOES AND ONE OF THE GEARS FALLING INTO THE ENGINE.
NTSB DEN89LA082