Aircraft impact following downdraft encounter

No fatalities • Iliamna, United States of America • Flight

An aircraft collided with hilly terrain during a low-altitude maneuver, resulting in injuries to all five people on board.

What happened

During a period of maneuvering, an aircraft encountered a powerful downdraft that led to a collision with hilly terrain. Prior to the descent and subsequent impact with the ground, the aircraft was positioned at an altitude of approximately 300 feet above ground level. The pilot had been engaged in spotting caribou when the aircraft settled into the side of a hill.

All five occupants sustained injuries during the accident, and the aircraft was destroyed upon impact.

Findings

Investigations into the incident identified several contributing factors regarding the flight conditions and pilot actions:

  • The presence of a downdraft significantly impacted the aircraft's stability.
  • The terrain involved in the collision was characterized as mountainous or hilly.
  • The pilot maintained an inadequate altitude during the maneuver.
  • The primary cause of the occurrence was a loss of control while in flight.

Probable cause

The aircraft experienced a loss of control due to encountering a downdraft at an insufficient altitude.

Frequently asked questions

What happened in the 1983-08-20 De Havilland DHC-2 Beaver accident near Iliamna, United States of America?

An aircraft collided with hilly terrain during a low-altitude maneuver, resulting in injuries to all five people on board.

Were there any fatalities in the 1983-08-20 De Havilland DHC-2 Beaver accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 1983-08-20 involved a De Havilland DHC-2 Beaver, registration N3129S, operated by Alaska North Flying Service, at Iliamna, United States of America.

What was the probable cause of the accident?

The aircraft experienced a loss of control due to encountering a downdraft at an insufficient altitude.

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