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NTSB Report
June 30, 1990 · De Havilland DHC-3 · N17689
Beaver Village, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 30, 1990
Injury Outcomes
1 injury (1 minor injury), 8 uninjured
Location
Beaver Village, AK
Aircraft
De Havilland DHC-3
Tail Number
N17689
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
ANC90LA103
THE PILOT REPORTED A SUBSTANTIAL LOSS OF POWER WHILE IN CRUISE FLIGHT. HE WAS UNABLE TO MAINTAIN ALTITUDE AND THE AIRCRAFT CRASHED INTO TREES. AN EXAMINATION OF THE RECENTLY OVERHAULED ENGINE REVEALED A FRACTURED EXHAUST ROCKER ARM THAT CAUSED THE LOSS OF POWER.
NTSB Probable Cause
MECHANICAL FAILURE OF AN EXHAUST ROCKER ARM.
Full Narrative
THE PILOT REPORTED A SUBSTANTIAL LOSS OF POWER WHILE IN CRUISE FLIGHT. HE WAS UNABLE TO MAINTAIN ALTITUDE AND THE AIRCRAFT CRASHED INTO TREES. AN EXAMINATION OF THE RECENTLY OVERHAULED ENGINE REVEALED A FRACTURED EXHAUST ROCKER ARM THAT CAUSED THE LOSS OF POWER.
Flight
Event TypeAccident
Event Time11:30 AKDT
Nearest Airport0nm N
Runway0
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDe Havilland DHC-3
Tail NumberN17689
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-1340 · Reciprocating · 600
Seats9
People & Injuries
Injury Summary1 injury (1 minor injury), 8 uninjured
Fatal0
Serious0
Minor1
Uninjured8
Total9
Crew 1Age 38 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind70° @ 8 kt
Visibility50 sm
CeilingNone
Temperature / Dew Point70 F / 0 C
Altimeter0
Weather SourcePILO