ANC97LA144

NTSB accident investigation · Cessna 185 · Kotzebue, AK · September 3, 1997

Accident · No injuriesLimited investigationFinal report
Date
September 2, 1997, 17:00 local (Sep 3, 1997, 01:00 UTC)
Place
Kotzebue, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N185QBCessna 185
Weather
Visual (VMC) · Day
Status
Completed · report November 6, 1998
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19970902025739A
Case key
3064

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 collapse/deflation of the right main tire when the tire slipped on the tire wheel rim which resulted in the collapse of the right main landing gear due to overload.

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 - roll
Landing gear,tire - slippedCause
Landing gear,tire - collapsedCause
Gear collapsedLanding - roll
Landing gear,main gear - overload

Analysis

The pilot was landing the tailwheel-equipped airplane in a remote area. The airplane was equipped with oversize tundra type tires inflated to about 12 PSI. An adhesive, applied between the main wheel rim and the tire, helps to prevent the tire from rotating independent of the wheel. The pilot indicated that during the landing roll on grassy terrain, the right tire rotated away from the wheel rim. The tire deflated and began vibrating. The right main landing gear then collapsed, and the right wing struck the ground.

Factual narrative

On September 2, 1997, about 1700 Alaska daylight time, a tundra tire equipped Cessna 185, N185QB, crashed during landing at a remote area, about 30 miles north of Kotzebue, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight when the accident occurred. The airplane, operated by the pilot, sustained substantial damage. The certificated airline transport pilot, and the sole passenger, were not injured. Visual meteorological conditions prevailed.

A Federal Aviation Administration (FAA) inspector, Fairbanks Flight Standards District Office (FSDO), reported the airplane was damaged during landing along the Squirrel River.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on September, 9, 1997, at 1048, the pilot reported the airplane touched down in a grassy area. The airplane was equipped with oversize tires inflated to about 12 PSI. An adhesive, applied between the main wheel rim and the tire, helps to prevent the tire from rotating independent of the wheel. The pilot indicated that during the landing roll, the right tire rotated away from the wheel rim. The tire deflated and began vibrating. The right main landing gear then collapsed, and the right wing struck the ground.

The pilot did not return a pilot/operator report (NTSB report 6120.1/2).

Aircraft

Registration
N185QB
Reported as
Cessna 185
Category
Airplane
Serial number
185-0131
Engine
Continental IO-520, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Alaska Island Air
Registered owner
Michael A. Spisak
Airworthiness certificate
Standard, Normal
Departed
OTZ · 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
34
Certificates
Airline transport, Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
9,000 total

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
30 statute miles
Lowest ceiling
1,500 ft overcast

FAA reports on this event · 1

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