Individually Owned: 150,657
Corporate Owned: 137,281
Hidden Valley Airport
Aircraft Accident/Incident Report
Riverton, Wyoming 82501
Sunday, June 3, 2012 6:00 MDT
NTSB Narrative Summary Released at Completion of Accident
The pilot, who was flying a tailwheel-equipped agricultural aerial application airplane, was landing on a dirt airstrip in order to take on a load of application chemical. After he landed on the main gear and lowered the tailwheel to the surface, the airplane started to veer toward the side of the runway. The pilot was unable to keep the airplane from departing the side of the runway, and, because it was heading toward a big gully, he applied as much braking force as possible. As he applied the braking force, the airplane nosed over onto its back, which resulted in substantial damage to the upper wing and the vertical stabilizer. According to the pilot, there was no malfunction or anomaly associated with the airplane's directional control system or its braking system.
NTSB Probable Cause Narrative
The pilot's loss of directional control during the landing roll and his deliberate application of excessive braking pressure, which resulted in a noseover.
Event Information
| Type of Event | Accident |
| Event Date | 6/3/2012 |
| Event Day of the Week | Sunday |
| Time of Event | 600 |
| Event Time Zone | Mountain Daylight Time |
| Event City | Riverton |
| Event State | WYOMING |
| Event Country | -- |
| Zipcode of the event site | 82501 |
| Event Date Year | 2012 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 430726N |
| Event Location Longitude | 1081924W |
| Event Location Airport | Hidden Valley Airport |
| Event Location Nearest Airport ID | N/A |
| 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 | -- |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Pilot |
| Time of the weather observation | |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | -- |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | -- |
| Lighting Conditions | Dawn |
| 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) | 16 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | Variable |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Light and Variable |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 1 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 30118 |
| NTSB Notification Source | SEA Operations Center |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Jul 4 2012 12:29AM |
| User who most recently changed record | stam |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N5291 |
| NTSB Number | WPR12CA242 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 137: Agricultural |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | GRUMMAN |
| Aircraft Model | G-164A |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 572 |
| Certified Max Gross Weight | -- |
| 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 | 1 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | -- |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | -- |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | SKY AVIATION CORP |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | WORLAND |
| Aircraft Owner State | WY |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 82401-0051 |
| Operator is an individual? | No |
| Operator Name | SKY AVIATION CORP |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | WORLAND |
| Operator State | WY |
| Operator Country | USA |
| Operator Zip code | 82401-0051 |
| Operator Code | -- |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Agriculture |
| 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 Application |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | KRIW |
| Departure City | Riveerton |
| Departure State | WY |
| Departure Country | USA |
| Departure Time | 530 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | N/A |
| Destination City | Riverton |
| Destination State | WY |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jul 4 2012 12:30AM |
| User who most recently changed record | stam |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 34 |
| Runway Length | 4000 |
| Runway Width | 55 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |