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NTSB Report
January 29, 1993 · Piper PA-32 · N8327S
Port Heiden, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 29, 1993
Injury Outcomes
No injuries (1 uninjured)
Location
Port Heiden, AK
Aircraft
Piper PA-32
Tail Number
N8327S
Operator
Peninsula Airways
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC93LA029
THE NON SCHEDULED AIR TAXI CARGO FLIGHT, CONDUCTED UNDER 14 CFR PART 135, EXPERIENCED A LOSS OF ENGINE POWER WHILE IN CRUISE FLIGHT. THE PILOT MADE AN EMERGENCY LANDING ON SNOW COVERED TUNDRA. A POST ACCIDENT EXAMINATION OF THE POWERPLANT BY A FEDERAL AVIATION ADMINISTRATION AVIATION SAFETY INSPECTOR REVEALED THAT THE NUMBER 3 CYLINDER INTAKE VALVE STEM FAILED, CAUSING THE VALVE TO PASS THROUGH THE PISTON, RESULTING IN EXTENSIVE INTERNAL DAMAGE TO THE ENGINE.
NTSB Probable Cause
THE FAILURE OF THE NUMBER 3 CYLINDER INTAKE VALVE STEM. A FACTOR IN THE DEGREE OF DAMAGE THE AIRCRAFT SUSTAINED IN THE MISHAP WAS ATTRIBUTABLE TO THE OFF AIRPORT EMERGENCY LANDING ON SHOW COVERED TUNDRA.
Full Narrative
THE NON SCHEDULED AIR TAXI CARGO FLIGHT, CONDUCTED UNDER 14 CFR PART 135, EXPERIENCED A LOSS OF ENGINE POWER WHILE IN CRUISE FLIGHT. THE PILOT MADE AN EMERGENCY LANDING ON SNOW COVERED TUNDRA. A POST ACCIDENT EXAMINATION OF THE POWERPLANT BY A FEDERAL AVIATION ADMINISTRATION AVIATION SAFETY INSPECTOR REVEALED THAT THE NUMBER 3 CYLINDER INTAKE VALVE STEM FAILED, CAUSING THE VALVE TO PASS THROUGH THE PISTON, RESULTING IN EXTENSIVE INTERNAL DAMAGE TO THE ENGINE.
Flight
Event TypeAccident
Event Time04:57 AKST
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-32
Tail NumberN8327S
Aircraft CategoryAir
DamageSubstantial
OperatorPeninsula Airways
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-540-K1G5 · Reciprocating · 300
Seats6
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 31 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind330° @ 13 kt
Visibility20 sm
CeilingBroken clouds 2500 ft
Temperature / Dew Point14 C / 3 C
Altimeter29.00 inHg
Observation Time13:45
Weather SourceWFAC