Hughes 369HS accident near Buffalo, Wyoming, January 27, 1984
On January 27, 1984, a Hughes 369HS (helicopter), registered N4507C, was substantially damaged in an accident near Buffalo, Wyoming. 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
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- January 27, 1984
- Place
- Buffalo, Wyoming · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Hughes 369HS · all 369HSs on the register
- Registration
- N4507C · no longer on the register · serial 450733S
- 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 HELICOPTER LOST POWER A FEW MINUTES AFTER TAKEOFF AND MADE A FORCED LANDING. THE ACFT HAD BEEN REFUELED FROM A FUEL TRUCK SHORTLY BEFORE TAKEOFF. SAMPLES OF FUEL FROM THE ACFT AND THE FUEL TRUCK WERE EXAMINED AND FOUND TO CONTAIN WATER.
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: commercial pilot
- Ratings: instrument: helicopter; rotorcraft: helicopter
- Flight time: 4,000 hours in all; 2,400 in this make and model; 60 in the last 90 days; 4,000 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 2,589 hours
- Last inspection: annual inspection, January 19, 1984; 9 hours since
- Maximum gross weight: 3,000 lb
- Seats: 6
- Landing gear: fixed
- Engine: Allison 250-C20 (turboshaft); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: dusk
- Wind: from 180° at 5 knots, gusting 10
- Visibility: 50 statute miles
- Sky: clear
- Temperature: 36°F (2°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.
Other NTSB records under N4507C the same tail number, which may have belonged to a different aircraft at the time
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.