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Last updated: 23 October 2017
Fecha:viernes 30 septiembre 2005
Tipo:Silhouette image of generic C550 model; specific model in this crash may look slightly different
Cessna 550 Citation II
Operador:University of North Dakota
Registración: N77ND
Numéro de série: 550-0005
Año de Construcción: 1978
Horas Totales de la Célula:4262
Motores: 2 Pratt & Whitney Canada JT15D-4
Tripulación:Fatalidades: 0 / Ocupantes: 2
Pasajeros:Fatalidades: 0 / Ocupantes: 2
Total:Fatalidades: 0 / Ocupantes: 4
Daños en la Aeronave: Considerable
Consecuencias: Written off (damaged beyond repair)
Ubicación:96 km (60 milles) W of Fort Yukon, AK (   Estados Unidos de América)
Fase: En ruta (ENR)
Aeropuerto de Salida:Fairbanks International Airport, AK (FAI/PAFA), Estados Unidos de América
Aeropuerto de Llegada:Fairbanks International Airport, AK (FAI/PAFA), Estados Unidos de América
The Citation II research plane departed Fairbanks for an in-flight icing research flight. While in instrument meteorological conditions, the airplane accumulated about one inch of ice on the wing leading edge surfaces. The pilot cycled the deice boots to remove the ice accumulation. Several minutes later the pilot heard a loud "bang" at the rear of the airplane, and both engines lost power. An emergency descent was initiated and attempts were made to restart the engines. At an altitude of 3000 feet the attempts were abandoned and the pilot selected a fairly clear, burned area, and landed the airplane with the landing gear retracted. The airplane sustained structural damage to the wings, fuselage, and empennage during the accident.

Probable Cause:

PROBABLE CAUSE: "The pilot's improper use of anti-icing equipment during cruise flight, which resulted in ice ingestion into both engines (foreign object damage), the complete loss of engine power in both engines, and an emergency descent and landing on tree covered terrain. Factors associated with the accident were the icing conditions, inadequate crew resource management, and failure to use a checklist."

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 5 months
Accident number: ANC05LA150
Download report: Summary report



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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.
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