NTSB CAROL · Event
Event ANC02LA052
Registry · N21A
FAA Aircraft Registry record.
Make / Model
GRUMMAN G-21A
Year of manufacture
1946 · 56 years old at event
Engine
AMA/EXPR UNKNOWN ENG
Seats / Engines
8 seats · 2 engines
Last airworthiness date
19980702
ADS-B equipped
Yes — Mode-S A1B729
Registrant of record
D B AERO INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot's inadequate compensation for wind conditions during the landing roll, which resulted in an inadvertent ground loop/swerve. A factor associated with the accident was a crosswind.
Factual narrative
On June 17, 2002, about 1204 Alaska daylight time, an amphibious Grumman Goose G-21 airplane, N21A, sustained substantial damage following a loss of control during the landing roll at the Northway Airport, Northway, Alaska. The airplane was being operated as an instrument flight rules (IFR) cross-country personal flight under Title 14, CFR Part 91, when the accident occurred. The certificated private pilot and the two passengers were not injured. Visual meteorological conditions prevailed, and an IFR flight plan was in effect, but was canceled prior to starting the visual approach for landing. The flight originated at 1101, from the Whitehorse International Airport, Whitehorse, Yukon, Canada. During a telephone conversation with the National Transportation Safety Board investigator-in-charge on June 17, the pilot reported that while on approach for landing on runway 22, he encountered a strong right crosswind. He said that after touchdown, during the landing roll, a gust of wind lifted the right wing, and the airplane veered to the left. The airplane ultimately departed the left side of the runway, rolled down an embankment, and came to rest in an area that contained trees. The airplane sustained substantial damage to the right wing and right horizontal stabilizer. The closest official weather observation station is at the Northway Airport. On June 17, at 1207, about 3 minutes after the accident, a special weather observation was reporting in part: Wind, 310 degrees at 8 knots with gusts to 15 knots, variable 280 degrees to 350 degrees; visibility, 10 statute miles; clouds and sky conditions, clear; temperature, 71 degrees F; dew point, 39 degrees F; altimeter, 29.73 inHg. The pilot reported that there were no preaccident anomalies with the airplane. The certificated private pilot reported that while on approach for landing on runway 22, he encountered a strong right crosswind. After touchdown, during the landing roll, a gust of wind lifted the right wing, and the airplane veered to the left. The airplane ultimately departed the left side of the runway, rolled down an embankment, and came to rest in an area that contained trees. The airplane sustained substantial damage to the right wing and right horizontal stabilizer. The pilot reported that there were no preaccident anomalies with the airplane. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2002_ANC02LA052.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (loss of control). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- SKYbrary (Eurocontrol) 2024 · SKYbrary article
Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
SKYbrary comprehensive knowledge-base entry on Loss of Control In-Flight — definitions, contributing factors, accident case studies (Air France 447, Colgan 3407), and prevention strategies.
- NTSB Aircraft Accident Reports 2022 · Accident report
Loss of Control on Takeoff in Icing Conditions — Citation 560XL
Cessna Citation 560XL fatal takeoff icing accident, March 2018. Investigation of a Citation 560XL loss-of-control takeoff accident in icing conditions.
- Semantic Scholar 2021 · Article (Aviation)
ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH
Inflight loss of control (LOC-I) is a significant cause of General Aviation (GA) fixed-wing aircraft accidents. The United States National Transportation Safety Board’s database provides a rich source…
- NASA NTRS 2021 · Presentation
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
Abstract—We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
- NASA NTRS 2021 · Conference Paper
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
Browse the full corpus — academia portal ↗