NTSB Identification: ANC99LA118.
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Accident occurred Sunday, August 22, 1999 in ANAKTUVUK PASS, AK
Probable Cause Approval Date: 12/04/2000
Aircraft: Cessna 206, registration: N5446X
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The private certificated pilot departed from a remote lake, elevation 2,500 feet msl, after a week of hunting and camping. After departure, the pilot proceeded south along a river drainage. The pilot said a light rain was falling at the time, and he was orienting his position by pilotage, using a sectional map, and a topographic map. He said he became disoriented to his exact position, and turned into a small valley that was about five miles north of where he thought he was. The terrain was rising and he began climbing through 4,300 feet msl. Rain began to fall harder and the valley became too narrow to turn around. Clouds began to close around the airplane as he climbed to 5,300 feet msl. The terrain continued to rise, and the pilot noticed his airspeed was decreasing until the stall horn sounded. The airplane collided with rising, open terrain, and the floats were sheared off the airframe. The airplane received damage to the wings, propeller, and fuselage.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The pilot's continued flight into adverse weather conditions after becoming lost/disoriented. Factors in the accident were rising terrain, a blind/box canyon, and weather conditions consisting of clouds, rain, and fog.

Full narrative available

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