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NTSB Report
July 20, 1989 · Aerospatiale AS350D · N143EH
Long Beach, CA
Overview
Report Status
Probable Cause
Event Type
Incident
Date
July 20, 1989
Injury Outcomes
1 injury (1 minor injury), 5 uninjured
Location
Long Beach, CA
Aircraft
Aerospatiale AS350D
Tail Number
N143EH
Operator
Island Express Helicopters
Injuries
Minor
Aircraft Damage
Minor
NTSB Number
LAX89IA242
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.
NTSB Probable Cause
THE FAILURE OF THE ENGINE DRIVEN FUEL PUMP.
Full Narrative
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.
Flight
Event TypeIncident
Event Time11:23 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAerospatiale AS350D
Tail NumberN143EH
Aircraft CategoryHeli
DamageMinor
OperatorIsland Express Helicopters
Operating RulePart 135
Engines1
Engine TypeTurboshaft
Engine DetailsLycoming · LTS-101-600A2 · Turboshaft · 615
Seats6
People & Injuries
Injury Summary1 injury (1 minor injury), 5 uninjured
Fatal0
Serious0
Minor1
Uninjured5
Total6
Crew 1Age 35 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind300° @ 6 kt
Visibility12 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time18:50
Weather SourceWFAC