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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

January 19, 2005 · Cessna 185 · N9452N

Eek, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
January 19, 2005
Injury Outcomes
No injuries (2 uninjured)
Location
Eek, AK
Aircraft
Cessna 185
Tail Number
N9452N
Operator
Alaska State Troopers
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC05TA022

The private certificated pilot, a Fish and Wildlife Protection Officer, and the passenger, a State Trooper, were utilizing a wheel/ski-equipped airplane to conduct surveillance activities of hunters. The pilot was landing to the west on the hard packed snow and ice-covered lake, which he thought would require a correction for a left crosswind. After landing, as the airplane neared the end of its 950-foot long landing roll, the nose of the airplane veered to the left, and the airplane began to slide sideways. The airplane turned about 90 degrees to the left, and the right ski dug into the snow. The right wing and right stabilizer subsequently struck the surface of the frozen lake. The pilot noted in his written report: "As I exited the pilot's side of the aircraft, I was extremely surprised to find that the wind was actually a left quartering tailwind, at about 15 knots." The airplane sustained substantial damage to the right wing and right stabilizer. There were no preaccident mechanical anomalies noted with the airplane.

NTSB Probable Cause

The pilot's inadequate evaluation of weather conditions, which resulted in an on ground encounter with terrain during the landing roll. Factors associated with the accident were a tailwind, and snow-covered, icy terrain conditions.

Full Narrative

On January 19, 2005, about 1330 Alaska standard time, a wheel/ski equipped Cessna 185 airplane, N9452N, sustained substantial damage while landing on a frozen, snow-covered lake, about 70 miles east of Eek, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country public use flight when the accident occurred. The airplane was operated by the State of Alaska, Department of Public Safety, Anchorage, Alaska. The private certificated pilot, a Fish and Wildlife Protection Officer, and the passenger, an Alaska State Trooper, were not injured. Visual meteorological conditions prevailed, and VFR flight following procedures were in effect. The flight originated at the Bethel Airport, Bethel, Alaska, about 1200. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on January 20, the supervisor for the State of Alaska's aircraft section reported that the pilot and passenger were en route to Heart Lake to conduct surveillance activities of caribou hunters in the area. The supervisor said that the pilot was landing on the snow-covered lake, with the airplane's skis selected to the down position. He said that during the landing roll, the airplane's right ski dug into the snow, and the right wing and right stabilizer struck the surface of the frozen lake. The airplane sustained substantial damage to the right wing and right stabilizer. According to the pilot's written statement that was included with the NTSB Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) and submitted by the State of Alaska, the pilot reported that he was landing to the west on the hard packed snow and ice-covered lake, which he thought would required a correction for a left crosswind. He said that after landing, and as the airplane neared the end of its 950 long landing roll, the nose of the airplane veered to the left, and the airplane's skis began to slide sideways atop the hard packed snow-covered ice. Unable to correct the veer, the airplane eventually turned about 90 degrees to the left, and the right ski dug into the snow. The right wing and right stabilizer subsequently struck the surface of the frozen lake. The pilot noted in his written report: "As I exited the pilot's side of the aircraft, I was extremely surprised to find that the wind was actually a left quartering tailwind, at about 15 knots." The NTSB Pilot/Operator Aircraft Accident Report did not disclose any preaccident mechanical anomalies with the airplane.

Flight

Event TypeAccident
Event Time08:30 AKST
Nearest Airport0nm
Flight Plan FiledCvfr
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 185
Tail NumberN9452N
Aircraft CategoryAir
DamageSubstantial
OperatorAlaska State Troopers
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-520-D · Reciprocating · 300
Seats4

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 37 · First Class · None

Conditions

ConditionsVMC
LightDaylight
Wind90° @ 15 kt
Visibility25 sm
CeilingNone
Temperature / Dew Point10 C / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data