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Aviation safety reports, made easier to study

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NTSB Report

August 31, 1999 · Piper PA-12 · N3824M

Skwentna, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
August 31, 1999
Injury Outcomes
No injuries (2 uninjured)
Location
Skwentna, AK
Aircraft
Piper PA-12
Tail Number
N3824M
Operator
High Country Alaska
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC99LA131

The commercial certificated pilot/hunting guide was landing at a remote airstrip located on a mountain ridge with an assistant guide. The purpose of the flight was to establish a camp for his hunting clients. The landing strip is oriented north/south at 3,500 feet msl, and is 850 feet long, and 30 feet wide. The pilot had landed on the ridge numerous times in the past. The pilot said he made several low passes over the area to assess the landing area and wind conditions. During the low passes over the ridge, he noted a quartering head wind from the right, of 10 miles per hour. He said he landed on the ridge, but just after touchdown, encountered a wind gust that pushed the airplane to the left. He added engine power to abort the landing. The tailwheel came off the ground, and he turned the airplane downhill to the left to gain airspeed. The right wing, and the main tires struck the ground on the downhill side of the ridge. The airplane received damage to the landing gear, and the right wing spar.

NTSB Probable Cause

The pilot's inadequate compensation for wind conditions. Factors in the accident were a crosswind, and wind gusts.

Full Narrative

On August 31, 1999, about 1430 Alaska daylight time, a tundra tire equipped Piper PA-12 airplane, N3824M, sustained substantial damage while landing at a remote area, about 53 miles west of Skwentna, Alaska, at latitude 62 degrees, 03.978 minutes north, and longitude 153 degrees, 03.011 minutes west. The airplane was being operated as a visual flight rules (VFR) local area positioning flight under Title 14 CFR Part 91 when the accident occurred. The airplane was operated by the pilot, a hunting guide doing business as High Country Alaska. The commercial certificated pilot, and the sole passenger, an assistant guide with the company, were not injured. Visual meteorological conditions prevailed. VFR company flight following procedures were in effect. The accident was reported by another airplane pilot flying over the area. On September 4, 1999, during a telephone conversation with a National Transportation Safety Board (NTSB) investigator, the pilot reported he was planning to land on a ridge with his assistant guide to establish a camp for his hunting clients. He said the landing area is oriented north/south at 3,500 feet msl in the Ptarmigan Pass area of the Alaska Mountain Range, and that he had landed on the ridge numerous times in the past. He said he made several low passes over the area to assess the landing area and wind conditions. During the low passes over the ridge, he noted a quartering wind from the northeast of 10 miles per hour with no wind gusts. He said he landed on the ridge, but just after touchdown, encountered a wind gust that pushed the airplane to the left. He added engine power to abort the landing. He said the tailwheel came off the ground, and he turned the airplane downhill to gain airspeed, but the right wing, and main tires struck the ground on the downhill side of the ridge. The airplane received damage to the landing gear, and the right wing spar.

Flight

Event TypeAccident
Event Time14:30 AKDT
Nearest Airport0nm
Runway36
Runway Length850 ft
Runway Width30 ft
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper PA-12
Tail NumberN3824M
Aircraft CategoryAir
DamageSubstantial
OperatorHigh Country Alaska
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320 · Reciprocating · 160
Seats3

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 34 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind45° @ 6 kt
Visibility25 sm
CeilingOvercast 1000 ft
Temperature / Dew Point45 C / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data