Aircraft crash in Alaskan box canyon

Casualties unknown • Anaktuvuk Pass, AK, US

An aircraft crashed into terrain in a near vertical attitude in Alaska after departing a remote hunting camp to locate sheep.

What happened

The flight departed from a remote hunting camp located approximately 25 miles north of the accident site. The purpose of the flight was to locate sheep before dropping off a passenger. Following reports to the Alaska State Troopers that the aircraft was overdue, an aerial search operation discovered the wreckage the following day.

At the time of the accident, visual meteorological conditions were reported at the nearest weather station, situated 60 miles south of the crash site. According to an employee of the pilot, winds at the camp were calm, with some clouds visible to the south and mountain tops visible in the direction of the accident site.

The airplane struck terrain in a near vertical attitude and came to rest inverted at the bottom of a box canyon. The impact caused the empennage to rotate and twist to the right. A postcrash fire destroyed the fuselage and both fuel tanks.

The investigation

Postaccident examination of the engine and the aircraft revealed no preaccident anomalies.

Frequently asked questions

What happened in the 1999-08-07 Piper PA-18-150 accident near Anaktuvuk Pass, AK?

An aircraft crashed into terrain in a near vertical attitude in Alaska after departing a remote hunting camp to locate sheep.

What aircraft was involved and where did it happen?

The accident on 1999-08-07 involved a Piper PA-18-150, registration N4996V, at Anaktuvuk Pass, AK.

What was the probable cause of the accident?

The inadvertent stall/spin by the pilot. A factor was the box canyon into which he had flown.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X19393. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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