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NTSB Report
September 12, 2021 · Stinson 108-3 · N6476M
Port Alsworth, AK
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
September 12, 2021
Injury Outcomes
No injuries (1 uninjured)
Location
Port Alsworth, AK
Aircraft
Stinson 108-3 (1948)
Tail Number
N6476M
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC21LA086
The pilot reported that, during the landing roll while applying the brakes, the right brake “went flat.” The airplane veered to the left, impacted a stump, and nosed over, resulting in substantial damage to the fuselage and left wing. A postaccident examination revealed no mechanical anomalies with the brake system that would have precluded normal operation. Based on the available information, the reason for the loss of control during landing could not be determined.
NTSB Probable Cause
A loss of directional control for reasons that could not be determined based on the available information.
Full Narrative
On September 12, 2021, about 0900 Alaska daylight time, a Stinson 108-3, N6476M, was substantially damaged when it was involved in an accident near Port Alsworth, Alaska. The pilot was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that, during the landing roll while applying the brakes, the right brake “went flat.” The airplane veered to the left, impacted a stump, and nosed over, resulting in substantial damage to the fuselage and left wing. A postaccident examination revealed no mechanical anomalies with the brake system that would have precluded normal operation.
Flight
Event TypeAccident
Event Time09:00 AKDT
Nearest AirportPVT (0nm)
RunwayPVT
Runway Length720 ft
Runway Width50 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftStinson 108-3
Tail NumberN6476M
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-470-S · Reciprocating · 230
Seats4
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 30 · First Class · None
Conditions
ConditionsVMC
LightDaylight
Wind70° @ 8 kt
Visibility30 sm
CeilingBroken clouds 8000 ft
Temperature / Dew Point54 F / 45 F
Altimeter29.58 inHg
Observation Time08:53
Weather SourceWFAC