Aviation Accident Summaries

Aviation Accident Summary LAX87DVD01

STOCKTON, CA, USA

Aircraft #1

N28938

BELL 47G4A

Analysis

JUST AFTER TAKEOFF, THE ENGINE EXPERIENCED A POWER LOSS WHILE TRANSPORTING AGRICULTURAL EQUIPMENT. A FRACTOGRAPHIC EXAMINATION OF THE FAILED FUEL DISCONNECT FITTING BY ANAMET LABORATORIES, CONCLUDED THAT APPROXIMATELY 70% OF THE RETAINING RING ON THE FUEL DISCONNECT FITTING HAD FRACTURED BY METAL FATIGUE. THE FATIGUE CRACK WAS PRESENT PRIOR TO THE CRASH; HOWEVER, IT COULD NOT BE DETERMINED WHETHER THE FRACTURE MAY HAVE CAUSED PARTIAL CLOSING OF THE DISCONNECT VALVE IN THE FITTING. THIS COULD CUT OFF THE FUEL SUPPLY DURING OPERATION.

 

Source: NTSB Aviation Accident Database

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