Enstrom F-28C accident near Evergreen, Colorado, October 2, 1991
On October 2, 1991 at about 11:00 pm local time, a Enstrom F-28C (helicopter), registered N552H, was substantially damaged in an accident near Evergreen, Colorado. It was a personal 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
IN FLIGHT ENCOUNTER WITH A SUDDEN DOWNDRAFT. A FACTOR WAS: THE PILOT'S LACK OF TOTAL EXPERIENCE IN AIRCRAFT TYPE.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- October 2, 1991 · about 11:00 pm local time
- Place
- Evergreen, Colorado · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Enstrom F-28C · all F-28Cs on the register
- Registration
- N552H · registry record · serial 347
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE PILOT SAID HE LIFTED THE HELICOPTER OFF THE GROUND BUT BEFORE TRANSLATONAL LIFT WAS ACHIEVED, HE ENCOUNTERED A SUDDEN DOWNDRAFT. THE PILOT MADE A CONTROLLED CRASH BETWEEN TREES IN MOUNTAINOUS TERRAIN.
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, commercial pilot, flight engineer
- Ratings: multi-engine land; single-engine land; instrument: airplane; rotorcraft: helicopter
- Flight time: 16,000 hours in all; 80 in this make and model; 180 in the last 90 days; 42 in the last 30 days; 12,000 as pilot in command
- Medical certificate: Class 1 (valid medical--w/ waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Maximum gross weight: 2,350 lb
- Seats: 3
- Landing gear: fixed
- Engine: Lycoming HIO-360-E14D (piston); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Visibility: 50 statute miles
- Sky: clear
- Temperature: 0°F (-18°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.
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.