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ANC02LA090

2002-08-04 · Gulkana, Alaska, United States · None · 1 aircraft · Status: Completed

Airport PAGK

Current FAA registration · N4151Z

Make / Model
PIPER PA-18-150
Year of manufacture
1965 · 37 years old at event
Engine
LYCOMING 0-320 SERIES (180 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
19651104
ADS-B equipped
Yes — Mode-S A4E946

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

A jammed flight control system yoke/stick, which made directional control of the airplane not possible, and resulted in an in-flight collision with terrain.

Factual narrative

On August 4, 2002, about 1800 Alaska daylight time, a Piper PA-18-150 airplane, N4151Z, sustained substantial damage following a loss of control and in-flight collision with terrain after takeoff from the Gulkana Airport, Gulkana, Alaska. The airplane was being operated as a visual flight rules (VFR) personal flight under Title 14, CFR Part 91, when the accident occurred. The private pilot and sole passenger were not injured. Visual meteorological conditions prevailed, and no flight plan was filed. The flight originated at the McCarthy Airport, McCarthy, Alaska, about 1600, and was bound for Lake Hood Strip, Anchorage, Alaska, with a fuel stop at Gulkana. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on August 8, the pilot said he refueled the accident airplane at Gulkana, and prepared for departure. He said he and his passenger had some camping gear and food in the airplane, but they were well within the gross weight limitation of the airplane. He said it was hot, and the airport was reporting a density altitude of 3,500 feet. He chose to takeoff on the 2,100 foot gravel runway rather then the 5,000 foot paved runway, since the airplane was tundra tire-equipped. He said the winds were reported as light and variable, and that he held the airplane on the ground until his hand-held global positioning system (GPS) indicated a ground speed of 51 knots, and then lifted off. About 70 feet above ground level, he said he started a shallow left turn. He said as he rolled the airplane into the turn it started to descend, and he tried to level the wings. He said the control stick was jammed, and would not return to neutral. The airplane continued its descent, impacting the ground in a left turn. Both wings and fuselage sustained substantial damage. The pilot reported that the flight from McCarthy to Gulkana was uneventful, and that the airplane's engine was developing full power during takeoff at Gulkana. He further stated there were no known mechanical anomalies with the airplane prior to the accident. A postaccident examination by the pilot of the airplane's control system failed to disclose the reason for the control stick jam. The pilot and passenger were on a personal cross country flight. The pilot was taking off on a gravel runway after completing a refueling stop. According to the pilot, during the initial climb, he rolled the airplane into a left turn, but when he tried to roll out of the turn, the control stick was jammed. The airplane continued in a descending left turn and impacted the ground. Postaccident inspection of the airplane by the pilot failed to disclose any flight control system mechanical anomalies. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_2002_ANC02LA090.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type or causal vocabulary (loss of control). All research papers