Amateur-built SONERA II accident near De Pere, Wisconsin, September 10, 1984
On September 10, 1984 at about 7:30 pm local time, a amateur-built SONERA II, registered N2265N, was substantially damaged in an accident near De Pere, Wisconsin (Martins Aerodrome airport). It was a personal flight under general aviation rules (Part 91). 1 person had minor injuries. 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
- September 10, 1984 · about 7:30 pm local time
- Place
- De Pere, Wisconsin · Martins Aerodrome · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built SONERA II
- Registration
- N2265N · no longer on the register · serial 10023
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
PLT STATED THAT ON INITIAL CLIMB, HE BECAME DISTRACTED BY AN INSECT IN THE COCKPIT AND THE ACFT DRIFTED OFF THE RIGHT SIDE OF THE RWY, COLLIDING WITH TELEPHONE LINES NEAR THE END OF THE RWY.
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: 400 hours in all; 60 in this make and model; 25 in the last 90 days
- Medical certificate: Class 2 (expired)
- Seat: unk
The aircraft
- Airframe total time: 60 hours
- Last inspection: annual inspection, April 10, 1984
- Maximum gross weight: 950 lb
- Seats: 2
- Landing gear: retractable
- Engine: Volkswagen 1700CC (piston); 0 hours total
The flight
- Departed from: 92C Pulaski WI at 5:30 pm
- Destination: W178 Green Bay WI
- Flight plan: none
- Runway 19, 2,000 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 240° at 5 knots
- Visibility: 10 statute miles
- Sky: broken clouds at 3,500 ft; not recorded at 3,500 ft
- Temperature: 70°F (21°C), dew point 54°F (12°C)
- Altimeter: 29.00 inHg
- Observation at 7:50 pm from GRB, 19 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.
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.