Aircraft impact with sea ice during instrument approach

No fatalities • Kotzebue-Ralph Wien Memorial, United States of America • Landing (descent or approach)

An aircraft struck frozen pack ice during a GPS-based instrument approach in low-visibility conditions, resulting in a terrain impact.

What happened

During a GPS instrument approach, an aircraft collided with frozen pack ice approximately three miles from the destination airport. At the time of the accident, the area was experiencing instrument meteorological conditions, characterized by fog and snow that limited visibility to 0.75 miles.

According to statements provided by the pilot, the descent was steep and conducted while the autopilot was active. As the aircraft crossed the final approach course, the autopilot initiated a turn toward the airport. The pilot observed that the aircraft had overshot the intended course and that the autopilot was failing to provide adequate corrections. In response, the pilot disengaged the autopilot and attempted to manually steer the aircraft to intercept the final approach course.

During this period of descent, the pilot was performing several tasks, including completing the landing checklist, extending the flaps and landing gear, and tuning communication and navigation radios. The pilot reported that while focused on adjusting the radio frequencies, the sea ice approached too rapidly to allow for an evasive maneuver, leading to the impact with terrain.

Findings

  • The pilot reported that the aircraft showed no mechanical anomalies prior to the accident.
  • The pilot noted a failure to stay ahead of the aircraft while managing multiple cockpit tasks during the descent.

Probable cause

The pilot's attention was diverted by cockpit tasks, leading to a failure to monitor the aircraft's altitude and path during a steep descent in low visibility.

Frequently asked questions

What happened in the 2000-02-21 Piper PA-31 Cheyenne accident near Kotzebue-Ralph Wien Memorial, United States of America?

An aircraft struck frozen pack ice during a GPS-based instrument approach in low-visibility conditions, resulting in a terrain impact.

Were there any fatalities in the 2000-02-21 Piper PA-31 Cheyenne accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 2000-02-21 involved a Piper PA-31 Cheyenne, registration N219CS, operated by Cape Smythe Air Service, at Kotzebue-Ralph Wien Memorial, United States of America.

What was the probable cause of the accident?

The pilot's attention was diverted by cockpit tasks, leading to a failure to monitor the aircraft's altitude and path during a steep descent in low visibility.

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