Bell 206B accident near Cheyenne, Wyoming, October 9, 1984
On October 9, 1984 at about 8:15 pm local time, a Bell 206B (helicopter), registered N3912T, was substantially damaged in an accident near Cheyenne, Wyoming. It was a business flight under general aviation rules (Part 91). 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
- October 9, 1984 · about 8:15 pm local time
- Place
- Cheyenne, Wyoming
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Bell 206B · all 206Bs on the register
- Registration
- N3912T · no longer on the register · serial 3273
- Damage
- Substantial damage
- Flight
- Business flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE HELICOPTER'S TAIL ROTOR SECTION CONTACTED A PWR LINE DURING AN ATTEMPTED TAKEOFF. A SECTION OF TAIL ROTOR BLADE TIPWAS FOUND BENEATH THE PWR LINES. THE PILOT REPORTED A VIBRATION IN THE TAIL ROTOR CONTROL PEDALS. HE ATTEMPTED A LANDING INTO AN OPEN FIELD. DURING THE TOUCHDOWN THE HELICOPTER SPUN TO THE RIGHT AND ROLLED COMING TO REST ON ITS LEFT SIDE.
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: airline transport pilot
- Ratings: multi-engine land; single-engine land; instrument: helicopter; rotorcraft: helicopter
- Flight time: 5,800 hours in all; 1,152 in this make and model; 87 in the last 90 days
- Medical certificate: Class 1 (valid medical--no waivers/lim.)
- Seat: rgt
The aircraft
- Airframe total time: 21,723 hours
- Last inspection: annual inspection; 48 hours since
- Maximum gross weight: 3,200 lb
- Seats: 5
- Landing gear: fixed
- Engine: Allison 250-C20B (turboshaft); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 180° at 5 knots
- Visibility: 50 statute miles
- Sky: clear
- Temperature: 61°F (16°C), dew point 0°F (-18°C)
- Altimeter: 29.00 inHg
- Observation at 2:15 pm
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.