Amateur-built WASPAIR TOMCAT TOUR accident near Oconomowoc, Wisconsin, August 10, 1983
On August 10, 1983 at about 1:13 pm local time, a amateur-built WASPAIR TOMCAT TOUR (ultralight), registered UNREG, was substantially damaged in an accident near Oconomowoc, Wisconsin (None airport). It was an instructional flight under ultralight rules (Part 103). 1 person was seriously injured. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 10, 1983 · about 1:13 pm local time
- Place
- Oconomowoc, Wisconsin · None · map
- Type
- Accident
- Injuries
- 1 person was seriously injured.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built WASPAIR TOMCAT TOUR WASPAIR TO
- Registration
- UNREG · no longer on the register
- Damage
- Substantial damage
- Flight
- Instructional flight · ultralight rules (Part 103)
The NTSB's narrative final · quoted from the NTSB record
THE ULTRALIGHT COLLIDED WITH A TREE DURING A GO-AROUND. THE ACFT ENCOUNTERED AN UPDRAFT DURING THE LANDING ATTEMPT AND THE PILOT DECIDED TO GO-AROUND. THE ACFT WAS NOT ABLE TO GAIN ALT FAST ENOUGH TO CLEAR A TREE AT THE END OF THE FIELD. THE PILOT WAS IN CONTACT WITH AN INSTRUCTOR VIA A WALKIE-TALKIE RADIO AT THE TIME OF THE ACCIDENT.
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
- Ratings: single-engine land
- Medical certificate: Unknown
- Seat: ctr
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Seats: 1
- Landing gear: fixed
- Engine: Cuyuna UII-02 (type not recorded); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 170° at 5 knots
- Visibility: 15 statute miles
- Sky: broken clouds at 3,500 ft; not recorded
- Temperature: 73°F (23°C), dew point 0°F (-18°C)
- Altimeter: 30.00 inHg
- Observation at 1:00 pm from AUW, 13 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 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.
Other NTSB records under UNREG the same tail number, which may have belonged to a different aircraft at the time
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.