ANC02LA089

NTSB accident investigation · Helio H-295 · Fort Yukon, AK · August 2, 2002

Accident · No injuriesLimited investigationFinal report
Date
August 1, 2002, 16:30 local (Aug 2, 2002, 00:30 UTC)
Place
Fort Yukon, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N50718Helio H-295
Weather
Visual (VMC) · Day
Status
Completed · report April 29, 2003
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA Fairbanks FSDO-01
FAA report
20020801017099A
Case key
55370

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

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Probable cause

The failure of the axle shaft, which resulted in the separation of the right main tire/wheel from the airplane on landing.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionLanding - flare/touchdown
Landing gear,axle - failure,totalCause
Landing gear,wheel - separation

Analysis

The pilot reported that he was landing on a remote gravel strip when the right main landing gear tire/wheel separated from the airplane. He said the right main landing gear leg then dug into the ground, and the fuselage buckled at the landing gear attachment point. The pilot said he examined the right main landing gear axle, and found what he believes was a pre-existing crack where the axle failed.

Factual narrative

On August 1, 2002, about 1630 Alaska daylight time, a wheel-equipped Helio H-295 airplane, N50718, sustained substantial damage when the right main landing gear axle failed during landing at a remote unimproved airstrip, about 124 miles northwest of Fort Yukon, Alaska. The airplane was being operated by Circle Air of Central, Alaska, as a visual flight rules (VFR) business flight under Title 14, CFR Part 91, at the time of the accident. The solo commercial pilot was not injured. Visual meteorological conditions prevailed, and company VFR flight following procedures were in effect. The flight originated at a remote airstrip along Your Creek, about 40 miles north of the accident site.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on August 2, the pilot said as the airplane touched down, the right main wheel/tire separated from the landing gear. The right main landing gear leg then dug into the ground, and bent rearward. He said the fuselage structure and skin were damaged at the right main landing gear attachment point. He further stated that when he retrieved the wheel/tire, he noted that the axle was broken.

The pilot said prior to the accident there were no known mechanical anomalies with the airplane, but when he examined the broken axle he said he believed the failure was due to an "old crack."

Aircraft

Registration
N50718
Reported as
Helio H-295
Category
Airplane
Serial number
1268
Airframe hours
4,332
Engine
Lycoming GO-480, 295 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Registered owner
Dawn E. Foster
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
Annual · May 29, 2002 · 20 hours before
Departed
Fort Yukon, AK
Destination
Fort Yukon, AK
Flight plan
Company VFR

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
58
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Last flight review
June 14, 2002
Seat
Left
Flight hours
7,488 total · 291 in this make and model · 7,442 as pilot in command · 57 in the last 90 days · 28 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F

Docket · 6

The files NTSB released with the investigation on February 7, 2003, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.0 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N50718 · 1

Matched to the same aircraft by N-number and date.