Casualties unknown

Nose-over during takeoff from soft terrain in rural Alaska (N1759P)

Iliamna, AK, US

On September 9, 1988, a Piper PA-18 (registration N1759P) was involved in an aviation accident near Iliamna, AK. Investigators recorded the probable cause as: The pilot's decision to attempt takeoff from a rough, soft off-airport site in rural Alaska, which led to the main landing gear encountering an exceptionally soft spot and causing the airplane to nose over. 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 commercial pilot's aircraft nosed over while attempting to take off from a rough, soft off-airport site in rural Alaska due to encountering exceptionally soft ground.

What happened

The commercial pilot attempted to initiate takeoff from an unimproved, off-airport location situated in rural Alaska. The site was characterized by rough terrain and soft ground conditions typical of the region. During the initial phase of the takeoff roll, the aircraft's main landing gear encountered an exceptionally soft spot within the runway surface.

This sudden loss of support caused the nose of the airplane to pitch downward abruptly, resulting in a nose-over incident. The pilot later assessed that the accident was avoidable had he selected his landing site with greater care and avoided such soft terrain conditions prior to attempting the flight.

The investigation

Post-accident examination focused on the ground conditions at the departure site. The investigation confirmed that the takeoff area consisted of rough and soft off-airport terrain. No mechanical failures were identified as contributing factors; the primary issue was the interaction between the landing gear and the exceptionally soft spot in the ground during the acceleration phase.

Findings

The accident resulted from the pilot's decision to utilize a site with inadequate surface conditions for takeoff operations. The rough and soft nature of the off-airport location contributed directly to the loss of control. The pilot acknowledged that careful site selection and avoidance of soft terrain would have prevented the nose-over event.

Probable cause

The pilot's decision to attempt takeoff from a rough, soft off-airport site in rural Alaska, which led to the main landing gear encountering an exceptionally soft spot and causing the airplane to nose over.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X26735. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.