Casualties unknown

Yentna River Landing Incident Involving Left Gear Collapse (N97138)

Anchorage, AK, US

On September 16, 1983, a Stinson 108-1 (registration N97138) was involved in an aviation accident near Anchorage, AK. Investigators recorded the probable cause as: The pilot's failure to maintain adequate visual scanning while landing due to preoccupation with a moose near the landing area, which resulted in striking a dirt bank. 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 2026-06-20Data APIEditorial standards

An aircraft struck a dirt bank while landing on the Yentna River sandbar after the pilot was distracted by a moose, causing the left main gear to collapse.

What happened

The aircraft encountered a critical incident during the landing phase on a sandbar located along the Yentna River. According to the pilot's account, he became preoccupied upon sighting a moose near the intended landing area. This distraction led to a failure to exercise adequate care in selecting an appropriate landing path.

Despite having approximately 2000 feet of suitable landing surface preceding the touchdown point, the aircraft struck a dirt bank. The impact with the embankment resulted in significant structural damage, specifically causing the left main landing gear to collapse.

The investigation

The investigation focused on the pilot's account and the physical evidence at the site. The pilot confirmed that his attention was diverted by wildlife near the runway threshold. The presence of ample clear runway prior to the point of impact indicated that the error occurred in timing or trajectory control rather than surface availability.

Findings

The primary contributing factor was the pilot's preoccupation with a moose near the landing area. This distraction compromised his ability to maintain proper situational awareness and select a safe landing path, despite adequate runway length being available.

Probable cause

The pilot's failure to maintain adequate visual scanning while landing due to preoccupation with a moose near the landing area, which resulted in striking a dirt bank.

Frequently asked questions

What happened in the 16 Sept 1983 Stinson 108-1 accident near Anchorage, AK?

An aircraft struck a dirt bank while landing on the Yentna River sandbar after the pilot was distracted by a moose, causing the left main gear to collapse.

What aircraft was involved and where did it happen?

The accident on 16 Sept 1983 involved a Stinson 108-1, registration N97138, at Anchorage, AK.

What was the probable cause of the accident?

The pilot's failure to maintain adequate visual scanning while landing due to preoccupation with a moose near the landing area, which resulted in striking a dirt bank.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001214X44380. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.