Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Rock River, Wyoming 82058
Monday, April 14, 2008 10:38 MDT
NTSB Narrative Summary Released at Completion of Accident
The pilot made consistent statements to various law enforcement, medical response personnel, and the company that he has no memory of the accident sequence. The flight was for the purpose of transporting a State of Wyoming biologist along various watershed features in order to take a census of geese. The biologist said they had been flying about 100 feet agl following a creek over low rolling terrain while he observed and counted the geese. On previous flights, the pilot had flown too fast for the biologist to accurately count the birds of interest and he asked the pilot to fly slower. On this flight, the pilot extended the flaps and was flying slower than on previous flights at a speed he estimated at 50 to 60 miles per hour. They were following the creek and the pilot was in a turn to the right and then he began a turn back to the left. The biologist was looking away when he then heard the pilot call out an expletive. When he looked forward, the airplane was in a right wing and nose down attitude descending toward the ground. The pilot managed to level the airplane out just before ground impact. The biologist said he did not hear a change in the engine sounds during the sequence and had not heard the pilot voice any concerns about the way the airplane was handling.
NTSB Probable Cause Narrative
The pilot's failure to maintain an adequate airspeed while maneuvering that led to an inadvertent stall. A contributing factor in the accident was the low altitude of the flight that reduced the time available for recovery from an upset.
Event Information
| Type of Event | Accident |
| Event Date | 4/14/2008 |
| Event Day of the Week | Monday |
| Time of Event | 1038 |
| Event Time Zone | Mountain Daylight Time |
| Event City | Rock River |
| Event State | WYOMING |
| Event Country | -- |
| Zipcode of the event site | 82058 |
| Event Date Year | 2008 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 415316N |
| Event Location Longitude | 1055553W |
| Event Location Airport | -- |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1053 Mountain Daylight Time |
| Direction of event from weather observation facility (degrees) | 150 |
| Weather Observation Facility ID | KLAR |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | 30 |
| Time Zone of the weather observation | MDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 12 |
| 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) | 17 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.12 |
| 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 | 1 |
| Injury Total None | -- |
| Injury Total Serious | 1 |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 23614 |
| NTSB Notification Source | FAA |
| NTSB Notification Date | Apr 14 2008 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | May 28 2008 12:03PM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Casper, WY |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N73WY |
| NTSB Number | LAX08LA103 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | Company VFR |
| Flight plan Was Activated? | Yes |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Artic Aircraft Corp. |
| Aircraft Model | S-1B2 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 1028 |
| Certified Max Gross Weight | 1650 |
| 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 | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Apr 1 2008 12:00AM |
| Airframe hours since last inspection | 29 |
| Airframe Hours | 7868 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Sky Aviation |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | -- |
| Aircraft Owner State | -- |
| Aircraft Owner Country | -- |
| Aircraft Owner Zipcode | -- |
| Operator is an individual? | Yes |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | PO Box 79 |
| Operator City | Worland |
| Operator State | WY |
| Operator Country | USA |
| Operator Zip code | 82401 |
| Operator Code | BZHA |
| Owner has at least one certificate | None |
| 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) | Aerial Observation |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | LAR |
| Departure City | Laramie |
| Departure State | WY |
| Departure Country | USA |
| Departure Time | 640 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | -- |
| Destination City | -- |
| Destination State | -- |
| Destination Country | -- |
| Specific Phase of Flight | Maneuvering |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | May 6 2008 5:26PM |
| User who most recently changed record | COOS |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |