Aircraft collision with terrain following downdraft during takeoff

Casualties unknown • Bethel, AK, US

An airplane collided with rough terrain after encountering a sudden downdraft shortly after departing a private airstrip in a narrow canyon.

What happened

A pilot and three passengers were departing from a remote, private airstrip located at an elevation of 1,200 feet mean sea level. The runway used for the departure measured 1,000 feet in length and 40 feet in width, situated within a narrow canyon characterized by steep terrain to the north and lower hills to the south.

During the takeoff maneuver on a magnetic heading of 130 degrees, the airplane lifted off near the end of the runway. After reaching an altitude of approximately 50 feet above the ground, the aircraft encountered a sudden downdraft. This resulted in a descent toward the ground, leading to a collision with rough terrain. At the time of the accident, wind conditions were reported as 040 degrees at 20 knots, with gusts reaching 25 knots. The occupants of the aircraft were not injured.

Probable cause

The airplane encountered a sudden downdraft during the initial climb following takeoff, causing it to descend into rough terrain.

Frequently asked questions

What happened in the 1997-09-07 Cessna 207A accident near Bethel, AK?

An airplane collided with rough terrain after encountering a sudden downdraft shortly after departing a private airstrip in a narrow canyon.

What aircraft was involved and where did it happen?

The accident on 1997-09-07 involved a Cessna 207A, registration N7318U, at Bethel, AK.

What was the probable cause of the accident?

The airplane encountered a sudden downdraft during the initial climb following takeoff, causing it to descend into rough terrain.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X08761. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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