Boeing A75N1 accident near Oshkosh, Wisconsin, August 2, 1990
On August 2, 1990 at about 9:42 pm local time, a Boeing A75N1, registered N25400, was destroyed in an accident near Oshkosh, Wisconsin (Wittman Field). It was a flight of an unrecorded kind under general aviation rules (Part 91). 1 person was killed. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN AIRSPEED SUFFICIENT TO AVOID A STALL/SPIN AT AN ALTITUDE INSUFFICIENT TO EFFECT A FULL RECOVERY.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 2, 1990 · about 9:42 pm local time
- Place
- Oshkosh, Wisconsin · Wittman Field
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Boeing A75N1 · all A75N1s on the register
- Registration
- N25400 · no longer on the register · serial 75-2901
- Damage
- Destroyed
- Flight
- Flight of an unrecorded kind · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE AIRCRAFT WAS ENGAGED IN PERFORMING AEROBATIC MANEUVERS IN CONNECTION WITH THE EXPERIMENTAL AIRCRAFT ASSOCIATIONS CONVENTION. THE AIRCRAFT ENTERED A SLOW ROLL TO THE LEFT. AT APPROXIMATELY THE INVERTED POSITION, THE AIRCRAFT DEPARTED CONTROLLED FLIGHT, ENTERED AN UNCOMMANDED SNAP ROLL (STALL/SPIN), TO THE LEFT. THE AIRCRAFT COMPLETED THREE-QUARTERS OF THE ROLL, STOPPED IN KNIFE-EDGE FLIGHT AND DESCENDED APPROXIMATELY 200 TO 300 FEET INTO THE TERRAIN.
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: commercial pilot
- Ratings: multi-engine land; multi-engine sea; single-engine land; single-engine sea; instrument: airplane; rotorcraft: balloon; rotorcraft: glider; rotorcraft: helicopter
- Flight time: 2,000 hours in all
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Maximum gross weight: 2,700 lb
- Seats: 2
- Landing gear: fixed
- Engine: Continental W-670-16 (piston); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 210° at 10 knots
- Visibility: 15 statute miles
- Sky: scat at 25,000 ft
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
- Observation at 9:43 pm from OSH, 1 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.