Friday, July 30, 2021

Loss of Engine Power (Total): Stinson Junior SR, N81Y; accident occurred July 29, 2021 in Ripon, Fond du Lac County, Wisconsin

Aviation Accident Factual 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; Milwaukee, Wisconsin

Investigation Docket - National Transportation Safety Board:
Location: Ripon, Wisconsin
Accident Number: CEN21LA343
Date and Time: July 29, 2021, 12:30 Local 
Registration: N81Y
Aircraft: Stinson JR. SR
Aircraft Damage: Substantial
Defining Event: Loss of engine power (total)
Injuries: 1 Minor, 3 None
Flight Conducted Under: Part 91: General aviation - Personal

Factual Information

On July 29, 2021, about 1230 central daylight time, a Stinson JR SR airplane, N81Y, was substantially damaged when it was involved in an accident near Ripon, Wisconsin. The pilot received minor injuries and the three passengers were not injured. The airplane was operated as a Title 14 Code of Federal Regulations 91 personal flight.

The airplane was in-bound to the destination airport via a visual flight rules arrival procedure when the engine lost total power. The pilot conducted a forced landing to a muddy field where the airplane nosed over and came to rest inverted.

The responding Federal Aviation Administration (FAA) inspector noted substantial damage to the empennage. The inspector also noted that the one fuel tank was empty and there was fuel staining on the soil. The pilot reported that the airplane should have had about 15 to 20 gallons of fuel remaining. He added that the carburetor was recently overhauled and that there might have been something wrong with the carburetor.

In a subsequent conversation, the pilot reported that he believed that nothing was wrong with the carburetor, but the airplane had an “odd fuel system” and if the fuel level was low, the engine could experience fuel starvation due to decreased fuel pressure, to which he attributed the loss of engine power.

Pilot Information

Certificate: Private 
Age: 40
Airplane Rating(s): Single-engine land 
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used:
Instrument Rating(s): None 
Second Pilot Present:
Instructor Rating(s): None
Toxicology Performed:
Medical Certification: Class 3 Without waivers/limitations
Last FAA Medical Exam: October 1, 2017
Occupational Pilot: No 
Last Flight Review or Equivalent:
Flight Time:

Aircraft and Owner/Operator Information

Aircraft Make: Stinson 
Registration: N81Y
Model/Series: JR. SR 
Aircraft Category: Airplane
Year of Manufacture: 1933 
Amateur Built:
Airworthiness Certificate: Normal
Serial Number: 8729
Landing Gear Type: Tailwheel 
Seats: 4
Date/Type of Last Inspection: May 10, 2021 
Annual Certified Max Gross Wt.:
Time Since Last Inspection: 
Engines: 1 Reciprocating
Airframe Total Time: 187 Hrs as of last inspection 
Engine Manufacturer: Lycoming
Engine Model/Series: 680
Registered Owner: 
Rated Power:
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: KOSH 
Distance from Accident Site:
Observation Time: 11:53 Local 
Direction from Accident Site:
Lowest Cloud Condition: Scattered / 3100 ft AGL
Visibility: 10 miles
Lowest Ceiling: None 
Visibility (RVR):
Wind Speed/Gusts: 8 knots / 
Turbulence Type Forecast/Actual:  /
Wind Direction: 90° 
Turbulence Severity Forecast/Actual:  /
Altimeter Setting: 29.94 inches Hg 
Temperature/Dew Point: 27°C / 22°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Dekalb, IL
Type of Flight Plan Filed: None
Destination: Oshkosh, WI (OSH) 
Type of Clearance: VFR
Departure Time: 
Type of Airspace: 

Wreckage and Impact Information

Crew Injuries: 1 Minor
Aircraft Damage: Substantial
Passenger Injuries: 3 None 
Aircraft Fire: None
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 1 Minor, 3 None 
Latitude, Longitude: 43.861263,-88.803719(est)

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