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ANC21LA086

2021-09-12 · Port Alsworth, Alaska, United States · None · 1 aircraft · Status: Completed

Airport PVT

Current FAA registration · N6476M

Make / Model
STINSON 108-3
Year of manufacture
1948 · 73 years old at event
Engine
FRANKLIN 6A4165 SERIES (165 hp)
Seats / Engines
4 seats · 1 engine
Last airworthiness date
19580709
ADS-B equipped
Yes — Mode-S A88272

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

A loss of directional control for reasons that could not be determined based on the available information.

Factual 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. 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. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • — Aircraft-Aircraft systems-Landing gear system-Brake-Failure

Verbatim from NTSB's published report. Source file NTSB_2021_ANC21LA086.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type or causal vocabulary (loss of control). All research papers