ANC24LA048

NTSB accident investigation · Stinson 108-2 · Bethel, AK · June 1, 2024

Accident · No injuriesClass 4 · LimitedFinal report
Date
May 31, 2024, 22:15 local (Jun 1, 2024, 06:15 UTC)
Place
Bethel, AK · 19R
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N299CStinson 108-2
Defining event
Landing-landing roll: Sys/Comp malf/fail (non-power)
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Alaska Regional Office
Parties
FAA/FSDO
Case key
194438

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The uncertificated pilot’s decision to fly an unairworthy airplane and his failure to maintain directional control during landing, which resulted in a landing gear collapse. Contributing was the failure of the right main landing gear oleo strut.

Findings · 5

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotStinson 108-2: 14 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedStinson 108-2: 13 casesAll aircraft: 3,958 cases
Maintenance: scheduled/routine maintenancePersonnel issues › Task performance · Owner/builderStinson 108-2: 2 casesAll aircraft: 320 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The uncertificated pilot reported that while on a cross-country flight in his tailwheel-equipped airplane, he stopped along the way for fuel, and during that landing, he noticed that the right main landing gear felt “mushy.” However, he elected to depart and continue the flight to the destination airport. While landing on the dry, paved runway, which required a correction for strong, gusting crosswind conditions, the left main landing gear wheel touched down first, then the right main landing gear wheel touched down. The pilot said as the weight of the airplane transferred to the right main landing gear, the right oleo strut “mushed out.” The airplane subsequently ground looped to the left, and the right main landing gear collapsed. The airplane sustained substantial damage to the right wing and fuselage. The pilot reported that before leaving on the accident flight, he had observed red fluid leaking from the right landing gear oleo strut assembly, and that the airplane had not flown for most of the year. A review of maintenance records revealed the last annual inspection of the airplane was nine years prior to the accident. According to FAA records, the pilot did not possess a pilot’s certificate. Other than the leaking oleo strut, the pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N299C
Reported as
Stinson 108-2
Category
Airplane
Serial number
108-3299
Built
1947
Engine
Franklin 6A4-165-B3, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 22, 2015
Departed
Wasilla, AK
Destination
Same as departure
Airport
BET · Bethel, runway 01L/19R, 6,400 × 150 ft, asphalt
Equipment
Unknown

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
54
Injuries
None
Medical
Unknown
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 13 knots, gusting 18
Visibility
10 statute miles
Lowest ceiling
8,000 ft broken
Temperature
55 °F, dew point 39 °F
Altimeter
29.82 inHg
Observed at
ABE

Docket · 3

The files NTSB released with the investigation on March 28, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 181 MB in all.