Bell 47G-3B-1 N40DP
4 July 1991 · Colorado Spring, Colorado, United States · No injuries
Summary
On 4 July 1991 at about 16:40 local time, a Bell 47G-3B-1 registered N40DP, operated by Helitech, Inc., was involved in an accident near Colorado Spring, Colorado, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 16:40
- Classification
- Accident
- Location
- Colorado Spring, Colorado, United States
- Coordinates
- 38.8292, -104.8100
- Aircraft
- Bell 47G-3B-1
- Registration
- N40DP
- Category
- Helicopter
- Engines
- 1
- Operator
- Helitech, Inc.
- Operating rule
- Part 135: Air Taxi & Commuter
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- DEN91LA096
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 0 | 0 | 2 |
Probable cause
THE PILOT ATTEMPTING TO OPERATE THE HELICOPTER OUTSIDE THE DESIGN OPERATING ENVELOPE. FACTORS WERE: HIGH ALTITUDE, HIGH TEMPERATURE, AND HIGH DENSITY ALTITUDE.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
DURING TAKEOFF FROM A HIGH ALTITUDE, HIGH DENSITY ALTITUDE HELICOPTER PAD, INSUFFICIENT POWER WAS AVAILABLE TO MAINTAIN FLIGHT OUT OF GROUND EFFECT AND THE HELICOPTER SETTLED INTO ROUGH AND UNEVEN TERRAIN. THE MAIN ROTOR BLADES STRUCK THE TERRAIN DURING LANDING. DENSITY ALTITUDE WAS 11,700 FEET.
Quoted verbatim from the NTSB record.
Other Bell 47 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 28 Oct 1991 | Bell 47D-1 | Rome, Georgia, United States | Silver Hawk Aviation | No injuries | - |
| 26 Sep 1991 | Bell 47G-5A | Pearsall, Texas, United States | Tiller Helicopter Service, Inc | Minor injuries | - |
| 19 May 1991 | Bell 47G-3B-1 | Malott, Washington, United States | Cascade Helicopter | No injuries | - |
| 20 Aug 1991 | Bell 47G | Kettleman City, California, United States | Shafter Aviation, Inc. | Minor injuries | - |
| 10 Sep 1991 | Bell 47G-3B-2 | Chula Vista, California, United States | K & L Helicopters | Minor injuries | - |
| 15 May 1991 | Bell 47-G3B1 | Hughesville, Pennsylvania, United States | Agricultural Helicopter Serv. | Serious injuries | - |
All 1,633 records for this type
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 2 Oct 1991 | Enstrom F-28C | Evergreen, Colorado, United States | James B. Highbanks | No injuries | - |
| 4 Oct 1991 | Cessna 172M | Erie, Colorado, United States | Tri-County Flight School | No injuries | - |
| 13 Oct 1991 | Piper PA-18-150 | Telluride, Colorado, United States | Christopher Carroll | No injuries | - |
| 30 Oct 1991 | Piper PA-24-250 | Ellicott, Colorado, United States | Southwest Aircraft Recovery | Minor injuries | - |
| 18 Nov 1991 | Piper PA-28-161 | Greeley, Colorado, United States | P.c. Flyers | No injuries | - |
| 20 Nov 1991 | Cessna 172N | Boulder, Colorado, United States | Dakota Ridge Aviation | No injuries | - |