NTSB Identification: CHI87DEE10.
The docket is stored on NTSB microfiche number 35532.
Accident occurred Tuesday, September 15, 1987 in PLAINFIELD, IL
Probable Cause Approval Date: 12/27/1988
Aircraft: HUGHES 269A, registration: N8927F
Injuries: 1 Minor.

WHILE MANEUVERING AT ABOUT 4 FEET ABOVE GROUND LEVEL THE PILOT EXPERIENCED A LOSS OF ENGINE POWER AND ENTERED AN UNCONTROLLED RIGHT TURN AND DESCENT, COLLIDING WITH THE GROUND. THE ENGINE POWER LOSS WAS DUE TO THE FAILURE OF A STUD AND BOLT HOLDING THE CRANKSHAFT IDLER GEAR SHAFT IN PLACE. THIS FAILURE CAUSED THE CRANKSHAFT IDLER GEAR TO DISENGAGE FROM THE CRANKSHAFT AND CAMSHAFT MAIN GEARS, RESULTING IN POWER LOSS.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ACCESSORY DRIVE ASSY..FAILURE,TOTAL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

AIRCRAFT CONTROL..NOT MAINTAINED..PILOT IN COMMAND

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