Amateur-built Comp Air 6 accident near Sturtevant, Wisconsin, April 21, 2007
On April 21, 2007 at about 7:20 pm local time, a amateur-built Comp Air 6, registered N6140U, was substantially damaged in an accident near Sturtevant, Wisconsin. It was a personal flight under general aviation rules (Part 91). 2 people had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot's failure to obtain a proper touchdown point, which resulted in a runway over run and subsequent nose-over of the aircraft, and the pilot's improper weather evaluation to land with a quartering tailwind. Factors contributing to the accident were a quartering tailwind, the standing water, and the pilot's late decision to abort the landing.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- April 21, 2007 · about 7:20 pm local time
- Place
- Sturtevant, Wisconsin · map
- Type
- Accident
- Injuries
- 2 people had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built Comp Air 6
- Registration
- N6140U · no longer on the register · serial 006426
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The airplane was substantially damaged when it nosed over during an aborted landing. The landing was being made on runway 26 right (2,343-foot-long by 120-foot-wide, turf). The pilot stated that he landed long and attempted to abort the landing. The abort was initiated too late and the aircraft went off of the end of the runway and into standing water. The landing gear contacted the soft terrain and the airplane nosed over. The wind condition reported at an airport 6 nautical miles south of the accident site, near the time of the accident was 140 degrees at 12 knots.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Certificate: private
- Ratings: single-engine land
- Flight time: 176 hours in all; 88 in this make and model; 2 in the last 90 days; 2 in the last 30 days; 176 as pilot in command
- Last flight review: August 1, 2006
- Medical certificate: Class 3 (with waivers/limitations)
- Seat: left
- Injury: minor injuries
The aircraft
- Airframe total time: 118.3 hours
- Last inspection: condition inspection, September 1, 2006
- Maximum gross weight: 3,500 lb
- Seats: 6
- Landing gear: fixed
- Engine: Lycoming IO-540 (piston); 0 hours total
The flight
- Departed from: BUU Burlington WI at 7:00 pm
- Destination: C89 Sturtevant WI
- Flight plan: none
Weather at the time
- Light: daylight
- Wind: from 140° at 12 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 70°F (21°C), dew point 39°F (4°C)
- Altimeter: 30.13 inHg
- Observation at 7:53 pm from KENW, 6 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.