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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

September 26, 2019 · Stinson 108 3 · N6533M

Tyonek, AK

Overview

Report Status
Probable Cause
Event Type
Accident
Date
September 26, 2019
Injury Outcomes
2 injuries (1 serious injury, 1 minor injury)
Location
Tyonek, AK
Aircraft
Stinson 108 3
Tail Number
N6533M
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
ANC19TA055

The pilot reported that during a short field takeoff from a small unimproved airstrip, as the airplane climbed through tree top altitude, the indicated airspeed decreased by 20-30 knots and the left wing dropped rapidly. The airplane descended and impacted trees beyond the airstrip. The wings and fuselage sustained substantial damage and the pilot sustained serious injuries. The passenger sustained minor injuries. The pilot stated that there were no mechanical malfunctions or failures that would have precluded normal operation and that the wind likely diminished during a critical phase of the climb out, and due to the slow airspeed, the left wing stalled resulting in an uncontrolled left roll.

NTSB Probable Cause

The pilot’s exceedance of the airplane’s critical angle of attack during a short field takeoff, which resulted in an aerodynamic stall and loss of control.

Full Narrative

The pilot reported that during a short field takeoff from a small unimproved airstrip, as the airplane climbed through tree top altitude, the indicated airspeed decreased by 20-30 knots and the left wing dropped rapidly. The airplane descended and impacted trees beyond the airstrip. The wings and fuselage sustained substantial damage and the pilot sustained serious injuries. The passenger sustained minor injuries. The pilot stated that there were no mechanical malfunctions or failures that would have precluded normal operation and that the wind likely diminished during a critical phase of the climb out, and due to the slow airspeed, the left wing stalled resulting in an uncontrolled left roll.

Flight

Event TypeAccident
Event Time19:00 AKDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftStinson 108 3
Tail NumberN6533M
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 6A4165 SERIES · Reciprocating · 165
Seats4

People & Injuries

Injury Summary2 injuries (1 serious injury, 1 minor injury)
Fatal0
Serious1
Minor1
Uninjured0
Total2
Crew 1Age 65 · Third Class · Serious

Conditions

ConditionsVMC
LightDaylight
Wind250° @ 9 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point48 / 32 C
Altimeter29.91 inHg
Observation Time18:53
Weather SourceWFAC

Appendix: Source Data