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NTSB Report
February 9, 1989 · Cessna 207 · N73771
Nome, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
February 9, 1989
Injury Outcomes
1 injury (1 serious injury)
Location
Nome, AK
Aircraft
Cessna 207
Tail Number
N73771
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
ANC89FA042
THE AIRPLANE TRANSPORT PILOT REPORTED THAT WHILE IN CRUISE FLIGHT HE EXPERIENCED A PARTIAL LOSS OF ENGINE POWER TWICE WITHIN A PERIOD OF ABOUT THREE MINUTES. HE WAS ABLE TO REGAIN ENGINE POWER BOTH TIMES, BUT THE SECOND TIME THE AIRPLANE IMPACTED ON A SNOW-COVERED MOUNTAIN SIDE BEFORE THE DESCENT COULD BE STOPPED. A TEAR DOWN AND ANALYSIS OF THE ENGINE FUEL PUMP REVEALED AN EIGHTH INCH LONG THREAD-LIKE METAL SLIVER LODGED UNDER THE LOW PRESSURE CHECK VALVE PLUNGER.
NTSB Probable Cause
THE PARTIAL LOSS OF POWER RESULTING FROM FUEL INTERRUPTION DUE TO A BLOCKAGE IN THE ENGINE FUEL PUMP LOW PRESSURE CHECK VALVE.
Full Narrative
THE AIRPLANE TRANSPORT PILOT REPORTED THAT WHILE IN CRUISE FLIGHT HE EXPERIENCED A PARTIAL LOSS OF ENGINE POWER TWICE WITHIN A PERIOD OF ABOUT THREE MINUTES. HE WAS ABLE TO REGAIN ENGINE POWER BOTH TIMES, BUT THE SECOND TIME THE AIRPLANE IMPACTED ON A SNOW-COVERED MOUNTAIN SIDE BEFORE THE DESCENT COULD BE STOPPED. A TEAR DOWN AND ANALYSIS OF THE ENGINE FUEL PUMP REVEALED AN EIGHTH INCH LONG THREAD-LIKE METAL SLIVER LODGED UNDER THE LOW PRESSURE CHECK VALVE PLUNGER.
Flight
Event TypeAccident
Event Time09:25 AKST
Nearest Airport14nm NE
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 207
Tail NumberN73771
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520-F · Reciprocating · 300
Seats8
People & Injuries
Injury Summary1 injury (1 serious injury)
Fatal0
Serious1
Minor0
Uninjured0
Total1
Crew 1Age 48 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind135° @ 10 kt
Visibility3 sm
CeilingNone
Temperature / Dew Point28 C / 0 C
Altimeter0
Weather SourcePILO