Bell 206L-3 accident near Fort Collins, Colorado, February 12, 1992
On February 12, 1992 at about 6:40 pm local time, a Bell 206L-3 (helicopter), registered N99TV, was substantially damaged in an accident near Fort Collins, Colorado. It was a ferry flight under general aviation rules (Part 91). 2 people were killed and 1 person was seriously injured. The weather was instrument conditions (cloud, fog or low visibility).
The NTSB's probable cause their words, unchanged
FAILURE OF THE NUMBER 2-1/2 BEARING DUE TO AN OBSTRUCTION OF A BEARING OIL FEED TUBE BY FOREIGN MATERIAL. FACTORS RELATED TO THE ACCIDENT WERE: IMPROPER MAINTENANCE DURING ENGINE OVERHAUL, AND WEATHER/TERRAIN/WATER CONDITIONS IN THE EMERGENCY LANDING AREA.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- February 12, 1992 · about 6:40 pm local time
- Place
- Fort Collins, Colorado · map
- Type
- Accident
- Injuries
- 2 people were killed and 1 person was seriously injured.
- Weather
- instrument conditions (cloud, fog or low visibility)
- Aircraft
- Bell 206L-3 · all 206L-3s on the register
- Registration
- N99TV · registry record · serial 51280
- Damage
- Substantial damage
- Flight
- Ferry flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE HELICOPTER WAS BEING FLOWN TO A MAINTENANCE FACILITY TO CORRECT A 'ROTOR VIBRATION' THAT HAD BEEN DETECTED BY THE PILOT. WHILE IN CRUISE FLIGHT OVER A RESERVOIR, A LOSS OF ENGINE POWER OCCURRED, WHEN THE #2-1/2 BEARING FAILED DUE TO OIL STARVATION. THE OIL STARVATION RESULTED FROM AN OBSTRUCTION IN THE BEARING OIL FEED TUBE BY A PARTICLE OF FOREIGN MATERIAL. THERE WAS EVIDENCE THE MATERIAL WAS INTRODUCED INTO THE SYSTEM DURING OVERHAUL, ABOUT 9 FLIGHT HOURS BEFORE THE ACCIDENT. THE PILOT MADE AN AUTOROTATION THROUGH DENSE FOG TO THE SURFACE OF THE RESERVOIR, WHICH CONTAINED PATCHES OF ICE. THE HELICOPTER SANK IN 190 FT OF WATER. WATER TEMPERATURE WAS 30 DEG F, AIR TEMPERATURE WAS 34 DEG, AND WIND WAS 170 DEG AT 8 KTS. ACCORDING TO AVAILABLE INFORMATION, USEFUL CONSCIOUS TIME UNDER THESE CONDITIONS WOULD HAVE BEEN ABOUT 15 MIN. THE FIRST RESCUE PERSONNEL REACHED THE PILOT APPROXIMATELY 45 MIN FOLLOWING THE ACCIDENT. THE PILOT WAS THE ONLY PERSON ON THE SURFACE AT THAT TIME.
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: 10,000 hours in all; 2,500 in this make and model; 40 in the last 90 days; 5 in the last 30 days; 9,500 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: rgt
The aircraft
- Airframe total time: 1,295 hours
- Last inspection: annual inspection, January 27, 1992; 9 hours since
- Maximum gross weight: 4,250 lb
- Seats: 6
- Landing gear: fixed
- Engine: Allison 250-C30P (turboshaft); 0 hours total
The flight
- Departed from: DEN Denver CO at 3:13 pm
- Destination: 3V5 Fort Collins CO
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 170° at 8 knots
- Sky: not recorded
- Temperature: 34°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.
Other NTSB records under N99TV 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.