Kolb Company TWINSTAR accident near Williamsport, Pennsylvania, May 5, 1991
On May 5, 1991 at about 2:27 pm local time, a Kolb Company TWINSTAR, an amateur-built aircraft,, registered N94MW, was substantially damaged in an accident near Williamsport, Pennsylvania (Finkhaven airport). It was a personal flight under general aviation rules (Part 91). 2 people had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
AN ENGINE SEIZURE AS THE RESULT OF OVERHEATING.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- May 5, 1991 · about 2:27 pm local time
- Place
- Williamsport, Pennsylvania · Finkhaven · map
- Type
- Accident
- Injuries
- 2 people had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Kolb Company TWINSTAR, amateur-built
- Registration
- N94MW · registry record · serial A-1
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE HOMEBUILT AIRPLANE COLLIDED WITH THE GROUND IN A HEAVILY WOODED RAVINE AFTER ITS ENGINE QUIT DURING CRUISE FLIGHT. THE FAA REPORTED THAT 'THE NUMBER TWO CYLINDER WAS SCORED' AND THE 'ENGINE SEIZED AFTER IT OVERHEATED.'
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; single-engine sea; instrument: airplane; rotorcraft: glider
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 410 hours
- Last inspection: annual inspection, October 10, 1990; 28 hours since
- Maximum gross weight: 735 lb
- Seats: 2
- Landing gear: fixed
- Engine: Rotax 503 3561619 (piston); 0 hours total
The flight
- Departed from: Trout Run PA at 1:55 pm
- Flight plan: none
- Runway 0, 2,500 ft by 80 ft
Weather at the time
- Light: daylight
- Sky: clear
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 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.