ANC04LA048

NTSB accident investigation · Cessna 182A · Skwentna, AK · April 26, 2004

Accident · No injuriesLimited investigationFinal report
Date
April 25, 2004, 17:45 local (Apr 26, 2004, 01:45 UTC)
Place
Skwentna, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N4861DCessna 182A
Weather
Visual (VMC) · Day
Status
Completed · report January 24, 2005
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA, Anchorage Flight Standards District Office
FAA report
20040425009599A
Case key
59125

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 pilot's selection of an unsuitable landing site, which resulted in a nose over during the landing roll.

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.

On ground/water encounter with terrain/waterLanding - roll
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Terrain condition - snow coveredFactor
Nose overLanding

Analysis

The private pilot reported he was landing at a private airstrip near a cabin. He said he flew over the airstrip to see if it was suitable for his wheel-equipped airplane. He noted what he thought was the gravel surface of the runway showing through patchy snow, and ruts in the snow as if made by landing airplanes. During the subsequent landing roll, the airplane's wheels sank in deep snow, and the airplane nosed over. The pilot stated that after the accident, he discovered that black cinders had been spread on the runway to expedite the melting of the snow, and it was the cinders he saw from the air, not the gravel runway surface.

Factual narrative

On April 25, 2004, about 1745 Alaska daylight time, a wheel-equipped Cessna 182A airplane, N4861D, sustained substantial damage when it nosed over while landing in deep snow at a private airstrip, about 12 miles west of Skwentna, Alaska. The solo private pilot/airplane owner was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the 14 CFR Part 91 local personal flight. The flight departed Merrill Field, Anchorage, Alaska, about 1700.

During a telephone conversation with the NTSB investigator-in-charge (IIC) on April 26, the pilot reported he was landing at a private airstrip near a friend's cabin. He said he flew over the runway, and observed what appeared to be a gravel surface showing through patchy snow, and ruts in the snow as if made by airplanes using the airstrip. He indicated that he felt it safe to land, but during the landing roll, the airplane's tires sank in deep snow, and the airplane nosed over, receiving structural damage to the wings, fuselage, and empennage. The pilot said that after the accident, he discovered that black cinders had been spread on the runway surface to expedite the melting of the snow, and it was the cinders he saw, not the gravel surface of the runway.

The pilot did not complete the NTSB Pilot/Operator Aircraft Accident Report (NTSB form 6120.1) as requested by the NTSB IIC.

Aircraft

Registration
N4861D
Reported as
Cessna 182A
Category
Airplane
Serial number
34961
Engine
Continental O-470, 230 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Robert K. Thornquist
Airworthiness certificate
Standard, Normal
Departed
MRI · Anchorage, AK
Destination
Skwentna, AK

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
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Unknown, Unknown
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Visibility
30 statute miles
Lowest ceiling
None

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 N4861D · 1

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