Sunday, November 28, 2021

Abnormal Runway Contact: Carlson Sparrow II, N725DW; accident occurred July 30, 2021 at Wittman Regional Airport (KOSH), Oshkosh, Winnebago County, Wisconsin

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; Milwaukee, Wisconsin

Investigation Docket - National Transportation Safety Board:

Location: Oshkosh, Wisconsin 
Accident Number: CEN21LA344
Date and Time: July 30, 2021, 10:00 Local
Registration: N725DW
Aircraft Damage: Substantial
Defining Event: Abnormal runway contact 
Injuries: 2 Minor
Flight Conducted Under: Part 91: General aviation - Personal


The pilot reported that during landing on a grass runway, the airplane first bounced about 5 ft high, then bounced a few more times as it neared the end of the runway. The pilot added that he did not have enough remaining runway to complete a go-around, so he applied the brakes, but they did not work. The airplane continued off the end of the runway and impacted a small ditch and sustained substantial damage to the fuselage and engine mount. A post-accident examination of the brake system revealed no mechanical malfunctions or anomalies 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:
The pilot’s improper landing flare which resulted in a bounced landing, a loss of control, and runway excursion.


Aircraft Airspeed - Not attained/maintained
Aircraft Descent rate - Not attained/maintained
Personnel issues Aircraft control - Pilot

Factual Information

History of Flight

Landing-flare/touchdown Abnormal runway contact (Defining event)
Landing-landing roll Loss of control on ground

Pilot Information

Certificate: Sport Pilot 
Age: 68, Male
Airplane Rating(s): Single-engine land
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): None 
Second Pilot Present: No
Instructor Rating(s): None Toxicology Performed:
Medical Certification: Sport pilot Unknown Last FAA Medical Exam:
Occupational Pilot: No 
Last Flight Review or Equivalent: April 13, 2021
Flight Time: 3800 hours (Total, all aircraft), 250 hours (Total, this make and model), 14 hours (Last 30 days, all aircraft), 4.5 hours (Last 24 hours, all aircraft)

Passenger Information

Certificate: Age: Female
Airplane Rating(s): Seat Occupied: Right
Other Aircraft Rating(s): 
Restraint Used: 3-point
Instrument Rating(s):
Second Pilot Present: No
Instructor Rating(s): 
Toxicology Performed:
Medical Certification:
Last FAA Medical Exam:
Occupational Pilot: No 
Last Flight Review or Equivalent:
Flight Time:

Aircraft and Owner/Operator Information

Aircraft Make: WEISS DENIS
Registration: N725DW
Model/Series: SPARROW II
Aircraft Category: Airplane
Year of Manufacture: 2005 
Amateur Built:
Airworthiness Certificate: Experimental (Special)
Serial Number: CA3-323
Landing Gear Type: Tricycle Seats: 2
Date/Type of Last Inspection: July 31, 2020 Annual
Certified Max Gross Wt.: 1200 lbs
Time Since Last Inspection: 
Engines: 1 Reciprocating
Airframe Total Time: 300 Hrs at time of accident 
Engine Manufacturer: Rotax
ELT: Installed, not activated 
Engine Model/Series:
Registered Owner: 
Rated Power: 81 Horsepower
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, 782 ft msl 
Distance from Accident Site: 1 Nautical Miles
Observation Time: 09:53 Local 
Direction from Accident Site: 15°
Lowest Cloud Condition: Clear 
Visibility:  10 miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 10 knots / 
Turbulence Type Forecast/Actual:  /
Wind Direction: 30° 
Turbulence Severity Forecast/Actual:  /
Altimeter Setting: 30.21 inches Hg 
Temperature/Dew Point: 19°C / 11°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Oshkosh, WI 
Type of Flight Plan Filed: None
Destination: Oshkosh, WI
Type of Clearance: VFR
Departure Time: 
Type of Airspace: Class D; Special

Airport Information

Runway Surface Type: Grass/turf
Airport Elevation: 808 ft msl
Runway Surface Condition: Dry
Runway Used: 05L/23R 
IFR Approach: None
Runway Length/Width: 1100 ft / 100 ft 
VFR Approach/Landing: Full stop; Traffic pattern

Wreckage and Impact Information

Crew Injuries: 1 Minor 
Aircraft Damage: Substantial
Passenger Injuries: 1 Minor 
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 2 Minor 
Latitude, Longitude: 43.969906,-88.562572


  1. Maybe he needs to ditch the flying

  2. that is merely your looks like to me he has a wing up on everyone