Aviation Accident Final Report - National Transportation Safety Board
The National Transportation Safety Board did not travel to the scene of this accident.
Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Boise, Idaho
Location: Nampa, Idaho
Accident Number: WPR21LA234
Date and Time: June 21, 2021, 19:08 Local
Registration: N8010B
Aircraft: BOLSTRIDGE WALLACE R SKY RAIDER 1
Aircraft Damage: Substantial
Defining Event: Loss of engine power (total)
Injuries: 1 None
Flight Conducted Under: Part 91: General aviation - Personal
Analysis
The pilot reported that, during preflight, he added five gallons of gasoline into the airplane’s fuel tank. He also measured out the two-cycle engine oil that was to be premixed with the gasoline then set it aside. Shortly after takeoff, and while in the traffic pattern, the engine lost power. The pilot initiated a forced landing in an open field, where the airplane impacted tall grass and nosed over, substantially damaged the left wing. Upon returning to the hangar, the pilot saw the oil he had set aside and realized that it was not added to the gasoline. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Probable Cause and Findings
The National Transportation Safety Board determines the probable cause(s) of this accident to be:
A total loss of engine power due to the pilot’s failure to premix the two-cycle oil/gasoline mixture, which resulted in a forced landing in a field and collision with terrain.
Findings
Aircraft Fuel additive - Fluid management
Personnel issues Lack of action - Pilot
Factual Information
History of Flight
Approach-VFR pattern downwind Loss of engine power (total) (Defining event)
Emergency descent Off-field or emergency landing
Pilot Information
Certificate: Student
Age: 51, Male
Airplane Rating(s): None
Seat Occupied: Single
Other Aircraft Rating(s): None
Restraint Used: 4-point
Instrument Rating(s): None
Second Pilot Present:
Instructor Rating(s): None
Toxicology Performed:
Medical Certification: None
Last FAA Medical Exam:
Occupational Pilot: No
Last Flight Review or Equivalent:
Flight Time: (Estimated) 500 hours (Total, all aircraft), 10 hours (Total, this make and model), 45 hours (Pilot In Command, all aircraft)
Aircraft and Owner/Operator Information
Aircraft Make: BOLSTRIDGE WALLACE R
Registration: N8010B
Model/Series: SKY RAIDER 1
Aircraft Category: Airplane
Year of Manufacture: 2000
Amateur Built: Yes
Airworthiness Certificate: Experimental (Special)
Serial Number: 6139425
Landing Gear Type: Tailwheel
Seats: 1
Date/Type of Last Inspection:
Certified Max Gross Wt.:
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time:
Engine Manufacturer: Rotax
ELT:
Engine Model/Series: 447
Registered Owner:
Rated Power: 40
Operator:
Operating Certificate(s) Held: None
Meteorological Information and Flight Plan
Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: KMAN, 2537 ft msl
Distance from Accident Site: 1 Nautical Miles
Observation Time: 07:15 Local
Direction from Accident Site: 159°
Lowest Cloud Condition:
Visibility: 10 miles
Lowest Ceiling:
Visibility (RVR):
Wind Speed/Gusts: 5 knots /
Turbulence Type Forecast/Actual: None / None
Wind Direction: 150°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.01 inches Hg
Temperature/Dew Point: 19°C / 9°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Nampa, ID
Type of Flight Plan Filed: None
Destination: Nampa, ID
Type of Clearance: None
Departure Time:
Type of Airspace: Class E
Airport Information
Airport: NAMPA MUNI MAN
Runway Surface Type: Asphalt
Airport Elevation: 2537 ft msl
Runway Surface Condition: Dry; Rough; Vegetation
Runway Used: 29
IFR Approach: Unknown
Runway Length/Width: 5000 ft / 75 ft
VFR Approach/Landing: Forced landing
Wreckage and Impact Information
Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries:
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 43.596279,-116.53099(est)
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