NTSB Identification: LAX89IA242.
The docket is stored on NTSB microfiche number 42421.
Nonscheduled 14 CFR
Incident occurred Thursday, July 20, 1989 in LONG BEACH, CA
Probable Cause Approval Date: 08/26/1992
Aircraft: AEROSPATIALE AS350D, registration: N143EH
Injuries: 1 Minor,5 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

THE PILOT WAS ABOUT 15 MINUTES INTO HIS OVER WATER FLIGHT WHEN THE ENGINE FAILED. THE FLOATS WERE DEPLOYED AND A SUCCESSFUL AUTOROTATION WAS MADE IN THE OCEAN. THE DRIVE SPLINES ON THE ENGINE DRIVEN FUEL PUMP EXHIBITED EVIDENCE OF EXCESSIVE ASYMMETRICAL WEAR AND THE ENGINE ACCESSORY DRIVE GEAR THAT DROVE THE FUEL PUMP SPLINES WAS EXCESSIVELY WORN. THE EXCESSIVE CLEARANCE BETWEEN THE GEAR AND SPLINE PERMITTED SLIPPAGE IN THE FUEL PUMP DRIVE SYSTEM.

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

THE FAILURE OF THE ENGINE DRIVEN FUEL PUMP.

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