N9071D

Substantial
None

Piper PA-18S/N: 18-6437

Accident Details

Date
Wednesday, February 16, 2005
NTSB Number
ANC05LA036
Location
Talkeetna, AK
Event ID
20050218X00209
Coordinates
62.490833, -149.699996
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
1
Total Aboard
1

Probable Cause and Findings

The pilot's selection of unsuitable terrain for takeoff, which resulted in ski assembly damage during the takeoff run from a frozen, snow-covered lake, and subsequent nose over during an emergency landing. Factors contributing to the accident were an overload failure of the ski tip retaining assembly, and a hidden obstruction on the surface of the lake.

Aircraft Information

Registration
Make
PIPER
Serial Number
18-6437
Engine Type
Reciprocating
Model / ICAO
PA-18PA18
Aircraft Type
Fixed Wing Single Engine
No. of Engines
1
Seats
1
FAA Model
PA-18A 150

Registered Owner (Current)

Name
STURGIS RICHARD G
Address
6058 E HART LAKE LOOP
City
WASILLA
State / Zip Code
AK 99654-9361
Country
United States

Analysis

On February 16, 2005, about 1500 Alaska standard time, a ski-equipped Piper PA-18 airplane, N9071D, sustained substantial damage when it nosed over during an emergency landing on a snow-covered, frozen lake, after a main landing gear ski was damaged during the takeoff roll on the same lake. The remote lake is about 15 miles north-northeast of Talkeetna, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight under Title 14, CFR Part 91, when the accident occurred. The airplane was operated by the pilot. The commercial certificated pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed. The flight was intended to return to Talkeetna, and no flight plan was filed, nor was one required.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on February 16, the pilot reported that he was departing a frozen lake, covered by about one-and-a-half feet of snow. The pilot said the lake is about 1/4 mile long, and he was taking off toward the east. During the takeoff run, as the airplane was about to lift off, the left ski struck a bump, or unseen object of some kind in the snow. The left ski tip rotated downward, to a near vertical position, and the pilot indicated that the ski tip retaining cable and bungee were dangling loose. The pilot made an emergency landing on the lake, and during the touchdown, the tip of the left ski dug into the snow. The airplane nosed over and received substantial damage to the wings, fuselage, and empennage.

Data Source

Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# ANC05LA036