ANC09LA083

NTSB accident investigation · Cessna 185 · McCarthy, AK · August 16, 2009

Accident · No injuriesLimited investigationFinal report
Date
August 16, 2009, 09:30 local (17:30 UTC)
Place
McCarthy, AK
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N8209UCessna 185
Defining event
Landing-landing roll: Aircraft structural failure
Weather
Visual (VMC) · Day
Status
Completed · report December 29, 2009
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA FSDO
FAA report
20090816048469A
Case key
74535

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 separation of the right main landing gear wheel from the airplane during landing for undetermined reasons, which resulted in an inability to control the airplane.

Findings · 2

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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleCessna 185: 5 casesAll aircraft: 3,958 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 commercial pilot was on a Title 14, CFR Part 135, passenger flight when the accident occurred. The pilot said the right main landing gear wheel separated from the airplane during landing, and the airplane spun to the right striking the left wing on the ground. The pilot said there were no known mechanical problems with the airplane prior to the accident. He said the landing gear leg failed at the top axle bolt holes, and that the gear had been inspected during the last 100 hour inspection.

Factual narrative

On August 16, about 0930 Alaska daylight time, a tailwheel equipped Cessna 185 airplane, N8209U, sustained substantial damage during an off airport landing, about 15 miles northeast of McCarthy, Alaska. The airplane was being operated by Wrangell Mountain Air, Glennallen, Alaska, as a visual flight rules (VFR) passenger flight under Title 14, CFR Part 135, when the accident occurred. Visual meteorological conditions prevailed, and company flight following procedures were in effect. The commercial pilot and the three passengers were not injured. The flight departed McCarthy about 0900. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on August 18, the pilot said during the landing the right main landing gear wheel separated from the airplane. He said when the right gear leg dug into the ground the airplane spun to the right, the left wing struck the ground, and the airplane came to rest on its nose. The pilot said there were no known mechanical problems with the airplane prior to the accident, and that the airplane sustained substantial damage to the left wing. The pilot said the landing gear leg fractured at the top axle bolt holes. He said the landing gear leg had been inspected during the last 100 hour inspection.

Aircraft

Registration
N8209U
Reported as
Cessna 185
Category
Airplane
Serial number
185-0213
Airframe hours
7,731
Engine
Cont Motor IO-520D, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
Wrangell Mountain Air Inc, doing business as Wrangell Mountain Air
Registered owner
Wrangell Mountain Air Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 30, 2009
Departed
AK0 · McCarthy, AK
Destination
McCarthy, 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
59
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
June 26, 2009
Seat
Left
Flight hours
10,241 total · 3,700 in this make and model · 10,200 as pilot in command · 290 in the last 90 days · 94 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
8 statute miles
Lowest ceiling
4,000 ft overcast
Temperature
50 °F

Docket · 1

The files NTSB released with the investigation on October 25, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 589 KB 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.