ASN Aircraft accident Cessna 550 Citation II N77ND Fort Yukon, AK
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Status:Accident investigation report completed and information captured
Date:Friday 30 September 2005
Type:Silhouette image of generic C550 model; specific model in this crash may look slightly different
Cessna 550 Citation II
Operator:University of North Dakota
Registration: N77ND
MSN: 550-0005
First flight: 1978
Total airframe hrs:4262
Engines: 2 Pratt & Whitney Canada JT15D-4
Crew:Fatalities: 0 / Occupants: 2
Passengers:Fatalities: 0 / Occupants: 2
Total:Fatalities: 0 / Occupants: 4
Aircraft damage: Substantial
Aircraft fate: Written off (damaged beyond repair)
Location:96 km (60 mls) W of Fort Yukon, AK (   United States of America)
Phase: En route (ENR)
Departure airport:Fairbanks International Airport, AK (FAI/PAFA), United States of America
Destination airport:Fairbanks International Airport, AK (FAI/PAFA), United States of America
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

All engine powerloss
Forced landing outside airport



photo of Cessna-550-Citation-II-N77ND
accident date: 30-09-2005
type: Cessna 550 Citation II
registration: N77ND


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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