Amateur-built WENOSO accident near Olympia, Washington, December 7, 1990
On December 7, 1990 at about 11:50 pm local time, a amateur-built WENOSO, registered N1041, was destroyed in an accident near Olympia, Washington. It was a personal flight 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 INADVERTANT STALL/SPIN AND LOSS OF AIRCRAFT CONTROL BY THE PILOT IN COMMAND WHILE PERFORMING AEROBATIC MANEUVERS.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- December 7, 1990 · about 11:50 pm local time
- Place
- Olympia, Washington · map
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built WENOSO
- Registration
- N1041 · registry record · serial H.S 1
- Damage
- Destroyed
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
WHILE THE PILOT WAS PERFORMING AEROBATIC MANEUVERS, THE ACFT STALLED, ENTERED A SPIN AND IMPACTED THE GROUND IN A VERTICAL NOSE DOWN ATTITUDE.
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: multi-engine land; single-engine land
- Flight time: 455 hours in all
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Maximum gross weight: 900 lb
- Landing gear: fixed
- Engine: Continental A65-8-F (piston); 0 hours total
The flight
- Destination: NONE Oakville WA
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 240° at 4 knots
- Visibility: 30 statute miles
- Sky: overcast at 14,000 ft; not recorded
- Temperature: 45°F (7°C), dew point 39°F (4°C)
- Altimeter: 30.00 inHg
- Observation at 11:52 pm from OLM, 3 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.