Individually Owned: 150,657
Corporate Owned: 137,281
Butler County Airport
Aircraft Accident/Incident Report
Butler, Pennsylvania 16002
Wednesday, January 24, 2007 9:05 EST
NTSB Narrative Summary Released at Completion of Accident
The Citation 550 was being repositioned for an air ambulance transportation flight, and was on approach to land on a 4,801-foot-long, grooved, asphalt runway. The airplane was being flown manually by the copilot, who reported that the landing approach speed (Vref) was 106 knots. The pilot-in-command (PIC) estimated that the airplane "broke out" of the clouds about two miles from the runway. Both pilots stated that the airplane continued to descend toward the runway, while on the glide slope and localizer. Neither pilot could recall the airplane's touchdown point on the runway, or the speed at touchdown. Witnesses observed the airplane, "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. Data downloaded from the airplane's Enhanced Ground Proximity Warning System (EGPWS) revealed that the airplane's groundspeed at touchdown was about 140 knots. Review of the cockpit voice recorder suggested that the PIC failed to activate the airplane's speed brake upon touchdown. Braking action was estimated to be "fair" at the time of the accident, with about 1/4 to 1/2 inches of loose, "fluffy" snow on the runway. The PIC reported that he thought the runway might be covered with an inch or two of snow, which did not concern him. The copilot reported encountering light snow during the approach. Both pilots stated that they were not aware of any mechanical failures, or system malfunctions during the accident; nor were any discovered during post accident examinations. According to the airplane flight manual, the conditions applicable to the accident flight prescribed a Vref of 110 knots, with a required landing distance on an uncontaminated runway of approximately 2,740 feet. The prescribed landing distance on a runway contaminated with 1-inch of snow, at a Vref of 110 knots was approximately 5,800 feet. At Vref + 10 knots, the required landing distance increased to about 7,750 feet.
NTSB Probable Cause Narrative
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.
Event Information
| Type of Event | Accident |
| Event Date | 1/24/2007 |
| Event Day of the Week | Wednesday |
| Time of Event | 905 |
| Event Time Zone | Eastern Standard Time |
| Event City | Butler |
| Event State | PENNSYLVANIA |
| Event Country | -- |
| Zipcode of the event site | 16002 |
| Event Date Year | 2007 |
| Event Date Month | 1 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 404644N |
| Event Location Longitude | 0795629W |
| Event Location Airport | Butler County |
| Event Location Nearest Airport ID | BTP |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 1248 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 855 Eastern Standard Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | BTP |
| Elevation of weather observation facility | 1248 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | EST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 1100 |
| Lowest Non-Ceiling Height | 100 |
| Sky/Lowest/Cloud Conditions | Few |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 2.5 |
| Air Temperature at event time (in degrees celsius) | -2 |
| Dew Point at event time (in degress fahrenheit) | -5 |
| Wind Direction (degrees magnetic) | 220 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 3 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.02 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Serious |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | 3 |
| Injury Total None | -- |
| Injury Total Serious | 1 |
| Injury Total All | 4 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 23462 |
| NTSB Notification Source | FAA EROC |
| NTSB Notification Date | Jan 24 2007 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Apr 30 2008 1:28PM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Instrument Meteorological Cond |
| FAA District Office | Washington, DC |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N492AT |
| NTSB Number | NYC07FA058 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | Yes |
| Damage | Substantial |
| Aircraft Fire | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | 550 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 550-0472 |
| Certified Max Gross Weight | 14500 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 7 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Jan 1 2007 12:00AM |
| Airframe hours since last inspection | 65 |
| Airframe Hours | 10735 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | AIR TREK INC |
| Aircraft Owner Street Address | 3511 SILVERSIDE RD STE 109 |
| Aircraft Owner City | Wilmington |
| Aircraft Owner State | DE |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 19810 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | -- |
| Operator Zip code | -- |
| Operator Code | FDIA |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | -- |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | -- |
| Indicates Domestic or International Flight | -- |
| Operator carrying Pax/Cargo/Mail | -- |
| Type of Flying (Per_Bus / Primary) | Positioning |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | OKV |
| Departure City | Winchester |
| Departure State | VA |
| Departure Country | USA |
| Departure Time | 820 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | BTP |
| Destination City | Butler |
| Destination State | PA |
| Destination Country | USA |
| Specific Phase of Flight | Landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Apr 14 2008 8:26PM |
| User who most recently changed record | grer |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 8 |
| Runway Length | 4801 |
| Runway Width | 100 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |