Cessna 340 accident near Riverton, Wyoming, September 25, 1995
On September 25, 1995 at about 2:30 pm local time, a Cessna 340, registered N10DF, was substantially damaged in an accident near Riverton, Wyoming (Riverton Regional airport). It was a flight of an unrecorded kind under charter and air-taxi rules (Part 135). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
a partial loss of hydraulic fluid in the left brake system rendering the left brake inoperative.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 25, 1995 · about 2:30 pm local time
- Place
- Riverton, Wyoming · Riverton Regional · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 340 · all 340s on the register
- Registration
- N10DF · registry record · serial 3400197
- Damage
- Substantial damage
- Flight
- Flight of an unrecorded kind · charter and air-taxi rules (Part 135)
The NTSB's narrative final · quoted from the NTSB record
The pilot reported that while turning the airplane with power onto the runway for takeoff the left brake failed. The nose gear impacted a ditch, located in close proximity to the runway, and collapsed. Examination revealed that hydraulic brake fluid had leaked out of the left brake system. The source of the leakage was not found.
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; instructor: airplane multi-engine; instructor: airplane single-engine; instrument: airplane
- Flight time: 4,000 hours in all; 100 in this make and model; 30 in the last 90 days; 10 in the last 30 days; 3,900 as pilot in command; 1,900 on instruments
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 4,187 hours
- Last inspection: continuous airworthiness programme, September 23, 1995; 5 hours since
- Maximum gross weight: 6,290 lb
- Seats: 2
- Landing gear: retractable
- Engine: Continental TSIO-520-J (piston); 0 hours total
- Operator: American Check Transport, INC.
The flight
- Destination: WRL Worland WY
- Runway 28, 8,202 ft by 150 ft
Weather at the time
- Light: daylight
- Visibility: 60 statute miles
- Sky: clear
- Temperature: 45°F (7°C), dew point 30°F (-1°C)
- Altimeter: 30.00 inHg
- Observation at 2:40 pm from RIW
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.