N1083H

Substantial
None

Aeronca 15AC S/N: 15AC-102

Accident Details

Date
Friday, July 31, 1998
NTSB Number
ANC98LA113
Location
KODIAK, AK
Event ID
20001211X10463
Coordinates
57.789112, -152.400665
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 inadequate weather evaluation and compensation for wind conditions. Factors associated with the accident are wind gusts, a sudden windshift to a tailwind, the pilot's failure to abort the takeoff, and an inadvertent stall/mush.

Aircraft Information

Registration
Make
AERONCA
Serial Number
15AC-102
Engine Type
Reciprocating
Year Built
1948
Model / ICAO
15AC AB11
Aircraft Type
Fixed Wing Single Engine
No. of Engines
1
Seats
4
FAA Model
S15AC

Registered Owner (Current)

Name
HEAD WESLEY J
Address
PO BOX 3662
City
HOMER
State / Zip Code
AK 99603-3662
Country
United States

Analysis

On July 31, 1998, at 1331 Alaska daylight time, an Aeronca 15AC, float equipped airplane, N1083H, sustained substantial damage when it collided with an unoccupied storage shed during takeoff from the Lily Lake Seaplane Base, Kodiak, Alaska. The solo commercial pilot was not injured. The flight was operated by Cub Air, of Kodiak, under 14 CFR Part 91 as a positioning flight to pick up passengers. Visual meteorological conditions prevailed at the time of the accident, and a company flight plan was filed.

The pilot told the NTSB investigator-in-charge on July 31, 1998, that the gusty crosswinds and wind shifting from a headwind to a tailwind forced the plane onto the water without sufficient distance to stop before colliding with an obstacle on the shore of the departure end of Lily Lake. He stated that the engine was operating normally, and that he should have taken off to the northeast, instead of southwest, on the 2,100 feet long by 300 feet wide seadrome.

In his Pilot/Operator report, the pilot described the winds shifting from a headwind to a tailwind during the takeoff run. He further stated in this written report that he delayed his departure approximately one hour due to the crosswinds, but should have delayed longer until better, stabilized, winds prevailed. The pilot said that after settling back to the water during the takeoff run, the airplane became airborne again, and while attempting to climb over obstacles, lost altitude and airspeed, and struck a shed in the departure path.

Wind conditions at Kodiak International Airport, five miles southwest of the accident site, about the time of the accident, were reported to be from 300 degrees at 12 knots. The pilot described the winds at Lily Lake to be variable, at 10 knots gusting to 20 knots.

The runway for the Kodiak Municipal Airport is located at the immediate northeast end of the lake.

Data Source

Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# ANC98LA113