ANC99LA075
1999-06-11 · BIG LAKE, Alaska, United States · Serious · 1 aircraft · Status: Completed
Airport Z40
Current FAA registration · N2668P
- Make / Model
- PIPER PA-18-150
- Year of manufacture
- 1955 · 44 years old at event
- Engine
- LYCOMING 0-320 SERIES (180 hp)
- Seats / Engines
- 2 seats · 1 engine
- Last airworthiness date
- 19560302
- ADS-B equipped
- Yes — Mode-S A298C5
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot's inadvertent stall during takeoff. Factors associated with the accident are wind gusts and turbulence.
Factual narrative
On June 11, 1999, about 1540 Alaska daylight time, a Short Takeoff and Landing (STOL) equipped Piper PA-18 airplane, N2668P, sustained substantial damage during takeoff at the Goose Bay airstrip, about 10 miles south of Big Lake, 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 certificated private pilot, the sole occupant, sustained serious injuries. Visual meteorological conditions prevailed, and no flight plan was filed. The flight was en route to Merrill Field, Anchorage, Alaska. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on June 11, the pilot reported that he departed on runway 07. During the initial climb, about 100 feet above the ground, he said he encountered turbulence and windshear, and the airplane abruptly rolled to the right. He said he responded with abrupt aileron control input to the left, but the airplane did not respond, and indicated the controls felt "mushy, and ineffective." He was unable to regain control of the airplane, and it nosed down and collided with trees bordering the airstrip. He estimated the wind to be easterly, at 15, gusting to 25, knots. The pilot also noted in his NTSB Pilot/Operator Accident Report, that there were no preimpact mechanical anomalies with the airplane. The IIC interviewed another pilot who departed the same runway about 15 minutes prior to the accident airplane. This pilot reported moderate low level turbulence on initial climb. When he returned about 45 minutes later (about 30 minutes after the accident flight), he said the level of turbulence had increased, and he was forced to use full aileron control deflection during the approach and landing. An FAA airworthiness inspector went to the accident site the day of the accident and inspected the airplane. He reported to the NTSB IIC that all the flight controls were attached to their appropriate controls, and appeared functional. He discovered no evidence of any preimpact mechanical anomaly. The airplane sustained substantial damage to the propeller and left wing. The pilot was departing a gravel airstrip bordered by trees in his short takeoff and landing (STOL) equipped airplane. About 100 feet above the ground, he reported he encountered turbulence, and lost control of the airplane. The airplane collided with trees near the airstrip. Postaccident inspection of the airplane disclosed no evidence of any preimpact mechanical anomalies. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1999_ANC99LA075.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Search this event elsewhere
External sources are reported, not agency: signal that something happened, not fact about what happened.
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Related research
Matched on aircraft type or causal vocabulary (stall, turbulence). All research papers
- Embry-Riddle Scholarly Commons 2021 · Journal article (IJAAA) Comparative Study on the Prediction of Aerodynamic Characteristics of Mini - Unmanned Aerial Vehicle with Turbulence Models
When dealing with CFD simulations the turbulent nature is seen on most of the engineering flows and these flows need to be solved.
- arXiv 2020 · arXiv preprint Numerical Simulation of Iced Wing Using Separating Shear Layer Fixed Turbulence Models
Aerodynamic prediction of glaze ice accretion on airfoils and wing is studied using the Reynolds-averaged Navier-Stokes method.
- NASA NTRS 2019 · Conference Paper Prediction of stall and post-stall behavior of airfoils at low and high Reynolds numbers
An interactive boundary-layer method, together with the e(super n)-approach to the calculation of transition, has been used to predict the stall and post-stall behavior of airfoils at low and high Rey…
- arXiv 2026 · arXiv preprint Direct Numerical Simulations of Ice-Ocean Boundary Turbulence
Turbulent heat and freshwater transport at ice-ocean interfaces controls glacier and iceberg melt rates, yet the underlying physics remains poorly constrained.
- NASA NTRS 2026 · Conference Paper Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- arXiv 2025 · arXiv preprint Explainable LiDAR 3D Point Cloud Segmentation and Clustering for Detecting Airplane-Generated Wind Turbulence
Wake vortices - strong, coherent air turbulences created by aircraft - pose a significant risk to aviation safety and therefore require accurate and reliable detection methods.