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NTSB Report

February 24, 1998 · Cessna 185E · N4535F

Anchorage, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
February 24, 1998
Injury Outcomes
No injuries (3 uninjured)
Location
Anchorage, AK
Aircraft
Cessna 185E
Tail Number
N4535F
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC98LA017

The pilot landed the tailwheel-equipped airplane on a hard surface runway. The airplane was equipped with 29-inch tundra tires. During the landing roll, the left main landing gear wheel began to vibrate. The left wheel axle then broke, and the left wheel departed from the landing gear strut. The left wing tip struck the ground, and the airplane received damage to the left wing, left aileron, and the left elevator. The pilot stated the axle attaching bolts that secure the axle to the strut were stripped of their threads.

NTSB Probable Cause

A separation of the axle from the landing gear strut due to overload, and stripping of the axle bolt threads.

Full Narrative

On February 24, 1998, at 1534 Alaska standard time, a tailwheel equipped Cessna 185E airplane, N4535F, sustained substantial damage during the landing roll at Merrill Field, Anchorage, Alaska. The airplane was being operated as a local area personal flight when the accident occurred. The commercial certificated pilot, and the two passengers were uninjured. The airplane is registered to, and operated by, the pilot. Visual meteorological conditions prevailed. The flight departed the Big Lake Airport, Big Lake, Alaska, about 1510. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on February 25, 1998, at 0920, the pilot reported he landed normally on the asphalt surface of runway 24 at Merrill Field. The airplane is equipped with large tundra tires. During the landing roll, the left main landing gear wheel began to vibrate. The left wheel axle then broke, and the left wheel departed from the landing gear strut. The left wing tip struck the ground, and the airplane received damage to the left wing, left aileron, and the left elevator. The pilot stated the axle attaching bolts that secure the axle to the strut, were stripped of their threads. In the pilot/operator report (NTSB form 6120.1/2) submitted by the pilot, the form contains an optional entry for operator recommendations. The pilot included a recommendation to limit the use of 29 inch tires to non-paved surfaces.

Flight

Event TypeAccident
Event Time10:34 AKST
Nearest AirportMerrill Field (0nm)
Runway24
Runway Length3999 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 185E
Tail NumberN4535F
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520-D · Reciprocating · 300
Seats6

People & Injuries

Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 34 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind40° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point37 C / 10 C
Altimeter29.00 inHg
Observation Time19:52
Weather SourceWFAC

Appendix: Source Data