N1907A

Substantial
None

Piper PA-18S/N: 18-1741

Accident Details

Date
Tuesday, September 6, 2005
NTSB Number
ANC05CA139
Location
Fairbanks, AK
Event ID
20051005X01582
Coordinates
64.113334, -147.604995
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
2
Total Aboard
2

Probable Cause and Findings

The pilot's failure to maintain adequate airspeed during takeoff initial climb, which resulted in an inadvertent stall/mush, and subsequent in-flight collision with trees. A factor contributing to the accident was a tailwind.

Aircraft Information

Registration
Make
PIPER
Serial Number
18-1741
Engine Type
Reciprocating
Year Built
1952
Model / ICAO
PA-18PA18
Aircraft Type
Fixed Wing Single Engine
No. of Engines
1
Seats
2
FAA Model
PA-18AS-125

Registered Owner (Current)

Name
KNOPKE JAMES M
Address
PO BOX 16030
City
TWO RIVERS
State / Zip Code
AK 99716-0030
Country
United States

Analysis

On September 6, 2005, about 1200 Alaska daylight time, a tundra tire-equipped Piper PA-18 airplane, N1907A, sustained substantial damage when it collided with trees during takeoff initial climb from a remote area, about 45 miles south-southeast of Fairbanks, Alaska. The airplane was being operated as a visual flight rules (VFR) local area personal flight under Title 14, CFR Part 91, when the accident occurred. The airplane was operated by the pilot. The private certificated pilot, and the sole passenger, were not injured. Visual meteorological conditions prevailed. 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 September 6, the pilot's mechanic reported that the airplane had crashed, and the pilot was remaining in the field until the airplane was recovered. On September 13, the pilot telephoned the NTSB IIC, and reported that he was departing to the north, and downhill, from a one-way landing area, about 2,000 feet msl. The area, oriented north/south, was about 400 feet long, and about 15 feet wide. He said that after the engine run-up, he began the takeoff roll with one notch of flaps selected. The airplane lifted off and climbed to about 40 feet agl, with the engine rpm indicating about 2,700.

The pilot reported that due to what he believed to be a tailwind, the tail of the airplane felt as if it was pushed downward, raising the nose of the airplane. He lowered the nose to prevent a stall, and began raising the flaps. The airplane collided with spruce trees about 200 yards from the takeoff area, and received damage to the landing gear, stabilizer, both wings and wing lift struts.

Data Source

Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# ANC05CA139