Amateur-built SWEARINGEN SX300 accident near Eagle River, Wisconsin, October 18, 1991
On October 18, 1991 at about 10:00 pm local time, a amateur-built SWEARINGEN SX300, registered N9SX, was substantially damaged in an accident near Eagle River, Wisconsin (Eagle River Union airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE PARTIAL LOSS OF ENGINE POWER, FOR REASONS UNDETERMINED WHICH RESULTED IN AN ABORTED TAKEOFF AND EVENTUAL OVERRUN AND LANDING GEAR COLLAPSE.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- October 18, 1991 · about 10:00 pm local time
- Place
- Eagle River, Wisconsin · Eagle River Union · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built SWEARINGEN SX300 SWEARINGEN
- Registration
- N9SX · registry record · serial 68
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE PILOT OF THE AMATEUR BUILT AIRPLANE INDICATED THAT ON TAKEOFF ROLL THE ENGINE MISFIRED AND HE ABORTED THE TAKEOFF. THE PILOT WAS UNABLE TO STOP THE AIRPLANE ON THE REMAINING RUNWAY AND THE AIRPLANE OVERRAN THE END OF THE TAKEOFF RUNWAY. THE LANDING GEAR COLLAPSED DURING THE OVERRUN. A SUBSEQUENT EXAMINATION FAILED TO REVEAL THE NATURE OF THE PARTIAL POWER LOSS.
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: 415 hours in all; 36 in this make and model; 27 in the last 90 days; 4 in the last 30 days; 283 as pilot in command
- Medical certificate: Class 3 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Airframe total time: 70 hours
- Last inspection: inspection type not recorded, January 2, 2000; 70 hours since
- Maximum gross weight: 2,400 lb
- Seats: 2
- Landing gear: retractable
- Engine: Lycoming IO-540 (piston); 0 hours total
The flight
- Flight plan: none
- Runway 22, 5,000 ft by 75 ft
Weather at the time
- Light: daylight
- Wind: from 270° at 5 knots
- Visibility: 15 statute miles
- Sky: broken clouds at 10,000 ft; scat at 6,000 ft
- Temperature: 37°F (3°C), dew point 19°F (-7°C)
- Altimeter: 30.00 inHg
- Observation at 9:59 pm from RHI, 20 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.