Runway excursion Accident Cessna 550 Citation II N492AT,

ASN Wikibase Occurrence # 322018

Date:	Wednesday 24 January 2007
Time:	09:05
Type:	Cessna 550 Citation II
Owner/operator:	Air Trek
Registration:	N492AT
MSN:	550-0472
Year of manufacture:	1983
Total airframe hrs:	10730 hours
Engine model:	Pratt & Whitney Canada JT15D-4
Fatalities:	Fatalities: 0 / Occupants: 4
Aircraft damage:	Destroyed, written off
Category:	Accident
Location:	Butler County/K. W. Scholter Field Airport, PA (BTP) - United States of America
Phase:	Landing
Nature:	Ambulance
Departure airport:	Winchester Municipal Airport, VA (WGO/KOKV)
Destination airport:	Butler County/K. W. Scholter Field Airport, PA (BTP/KBTP)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
The purpose of the flight was to pick up a patient at Butler County (BTP) for a subsequent air ambulance transportation flight. The airplane was being flown by the copilot, who was seated in the left seat. At 08:59, the airplane was cleared for the ILS approach to runway 08, a 4,801 foot-long, 100 foot-wide, grooved, asphalt runway. The airplane was being manually flown by the copilot; who stated that the landing approach speed was 106 knots. She recalled being "a little fast" on the approach; however, she reduced the engine power to slow down. An eyewitness stated that the airplane appeared "high and fast" as it crossed over the runway threshold. The airplane touched down about halfway down the runway, and continued off the departure end. It then struck a wooden localizer antenna platform, and the airport perimeter fence, before crossing a road, and coming to rest about 400 feet from the end of the runway.
The airport manager estimated that braking action was "fair" at the time of the accident, with about 1/4 to 1/2 of loose, "fluffy" snow on the runway.

PROBABLE CAUSE: "The copilot's failure to maintain the proper airspeed, and failure to obtain the proper touchdown point, and the pilot-in-command's inadequate supervision, which resulted in an overrun. Contributing to the accident was the PIC's failure to activate the speed brake upon touchdown and the snow contaminated runway."

Accident investigation: