Casualties unknown

Amphibious Tailwheel Aircraft Ground Loops During Landing in Crosswind (N22932)

Unalaska, AK, US

On April 5, 2004, a Grumman G21 (registration N22932) was involved in an aviation accident near Unalaska, AK. Investigators recorded the probable cause as: The inadvertent ground loop/swerve by the second pilot during the landing roll, and the first (check) pilot's inadequate supervision of the second pilot, which resulted in a loss of control and substantial damage to the airplane. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

A recently qualified captain ground looped an amphibious tailwheel airplane during landing in a crosswind, causing left main landing gear collapse and substantial damage. Training records showed inadequate transition training with only 1.8 hours on type and 3 wheel landings.

Accident Overview

A scheduled commuter airline flight concluded with a landing on a hard-surfaced runway in a near direct crosswind of 7 knots gusting to 14 knots. The aircraft, an amphibious tailwheel airplane, was flown by a recently qualified captain serving as the second pilot. The pilot-in-command check airman occupied the right seat, which was equipped with all flight controls but lacked brake pedals. During the landing roll, the airplane ground looped to the right, causing the left main landing gear to collapse. The fuselage sustained substantial damage.

Pilot Training Experience

A review of the second pilot's training records and interviews with FAA personnel revealed that the second pilot had not received adequate transition training to the accident type airplane. At the time of the accident, the second pilot had logged a total of 1.8 hours in the accident type airplane, which included all training and a flight check. The second pilot had accrued approximately 7 hours of tailwheel experience over the previous 7 years prior to beginning training on the accident type airplane. During the transition training, the second pilot performed only 3 wheel landings in the accident type airplane, instead of the minimum required 12.

Aircraft Condition

Postaccident inspection of the airplane and maintenance records disclosed no evidence of any preaccident mechanical problems.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20040409X00437. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.