Narrative:The Caribou was on a positioning flight to Port Alsworth to pick up cargo. The airplane was configured for landing with 40 degrees of flaps. During the landing approach, variations in indicated airspeed and ground speed indicated windshear conditions. About 100 to 200 feet above the ground, the airplane encountered a downdraft and began to drift to the right of the runway centerline. The captain increased engine power and applied full left aileron and rudder, but could not gain directional or pitch control of the airplane. The right wing struck trees, short of the runway threshold, increasing the airplane's right yaw. As the airplane neared the ground, the captain pulled the engine throttles off. The airplane struck the ground with the right main landing gear and right front portion of the fuselage. The airplane then pivoted to the right, 180 degrees from the approach heading.
Probable Cause:
PROBABLE CAUSE: "The captain's failure to maintain the proper glidepath, and improper short field landing procedures. Factors in the accident were a downdraft, and the captain's inadequate evaluation of the weather conditions."
Accident investigation:
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Investigating agency: | NTSB |
Status: | Investigation completed |
Duration: | 279 days (9 months) | Accident number: | ANC01LA129 | Download report: | Summary report
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Sources:
» NTSB
Photos
accident date:
29-08-2001type: de Havilland Canada C-7A Caribou (DHC-4)
registration: HR-ALY
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does
not display the exact flight path.
Distance from Iliamna Airport, AK to Port Alsworth Airport, AK as the crow flies is 60 km (37 miles).
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.