Casualties unknown

Floatplane Wing Strike During Shore Approach (N3991Z)

Big Delta, AK, US

On September 12, 1995, a Piper PA-18-150 (registration N3991Z) was involved in an aviation accident near Big Delta, AK. Investigators recorded the probable cause as: The pilot's selection of an unsuitable step taxi/takeoff area. The submerged object was a related factor. 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 pilot hunting in the area was returning to base camp when his aircraft's left float struck a submerged object while step taxiing near the shore of a small lake.

What happened

The pilot reported that he was engaged in hunting activities within the local area and was in the process of returning to his established base camp. The specific incident occurred at a small lake where the pilot attempted to maximize the available takeoff distance for his subsequent departure. To achieve this, he employed a step taxiing technique, maneuvering the aircraft as close to the shoreline as possible.

During this low-speed maneuver, the pilot felt the left float make contact with an unidentified submerged object. The impact caused the front section of the left float to lift upward. This sudden movement resulted in the float striking the left wing struts. Consequently, the left wing was forced down into the water, causing damage to the aircraft structure.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001207X04413. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.