N89ZC - 1981 Aircraft Aircraft Registration

A fatigue failure of the overrunning clutch subassembly due to abnormal bending loads due to cracks on the center engine mount, which resulted in an inflight loss of power. Contributing to the accident was the helicopter's low altitude and airspeed when the loss of power occurred, which precluded the pilot from successfully performing an autorotation.

The pilot's failure to maintain clearance from power lines during an aerial observation flight. 

A total loss of engine power, which resulted from fuel exhaustion due to the pilot’s failure to adequately monitor the fuel quantity during the flight.

A loss of engine power due to fuel starvation resulting from the pilot’s inadequate preflight inspection of the main fuel valve position.