Beech 95 accident near Roundup, Montana, February 18, 1991
On February 18, 1991 at about 7:40 pm local time, a Beech 95, registered N2772Y, was substantially damaged in an accident near Roundup, Montana. It was a personal flight under general aviation rules (Part 91). No one was hurt; 3 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
PARTIAL LOSS OF POWER FOR UNDETERMINED REASONS.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- February 18, 1991 · about 7:40 pm local time
- Place
- Roundup, Montana · map
- Type
- Accident
- Injuries
- No one was hurt; 3 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Beech 95 · all 95s on the register
- Registration
- N2772Y · no longer on the register · serial TD-149
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
WHILE AT CRUISE FLIGHT AND IN IMC, THE RIGHT ENGINE LOST PARTIAL POWER. THE PILOT STATED THAT WHILE HE WAS ASSESSING THE PROBLEM WITH THE RIGHT ENGINE, THE LEFT ENGINE ALSO LOST PARTIAL POWER. THE PILOT DID NOT FOLLOW THE MANUFACTURER'S SINGLE ENGINE PROCEDURES, OR ENGINE ICE PROTECTION PROCEDURES. THE AIRPLANE WAS UNABLE TO MAINTAIN ALTITUDE AND A FORCED LANDING WAS INITIATED. DURING THE LANDING ROLL IN AN OPEN FIELD, THE AIRPLANE COLLIDED WITH A DITCH. WEATHER FORECASTS CAUTIONED OF MODERATE RIME ICING IN THE PRECIPITATION. BOTH ENGINES WERE TEST RUN AND FOUND TO OPERATE WITHIN NORMAL PARAMETERS.
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: flight instructor, commercial pilot
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Flight time: 1,461 hours in all; 104 in this make and model; 83 in the last 90 days; 23 in the last 30 days; 1,375 as pilot in command; 38 on instruments
- Medical certificate: Class 1 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Maximum gross weight: 4,000 lb
- Seats: 4
- Landing gear: retractable
- Engine: Lycoming IO-360-A1A (piston); 0 hours total
The flight
- Departed from: LWT Lewistown MT at 7:08 pm
- Destination: BFF Scottsbluff NE
- Flight plan: IFR
- Runway 0
- A second pilot was aboard
Weather at the time
- Light: dawn
- Wind: from 320° at 8 knots
- Visibility: 5 statute miles
- Sky: overcast at 500 ft; not recorded
- Temperature: 30°F (-1°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 2 |
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.