Bell 47G-2 N90529
26 August 1990 · Wall Lake, Iowa, United States · No injuries
Summary
On 26 August 1990 at about 00:40 local time, a Bell 47G-2 registered N90529 was involved in an accident near Wall Lake, Iowa, United States. One person was 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 00:40
- Classification
- Accident
- Location
- Wall Lake, Iowa, United States
- Coordinates
- 42.2600, -95.0901
- Aircraft
- Bell 47G-2
- Registration
- N90529
- Category
- Helicopter
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 137: Agricultural
- Purpose of flight
- Aerial Application
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- CHI90DCD02
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
THE FAILURE OF THE PILOT TO MAINTAIN ROTOR RPM DURING TAKEOFF. THE HIGH DENSITY ALTITUDE AND UPHILL TERRAIN WERE FACTORS.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
AFTER REFUELING & RELOADING THE HELICOPTER WITH A SPRAY SOLUTION AT A FIELD SITE, A TAKEOFF WAS INITIATED IN CALM WIND CONDITIONS. THE PLT RPRTD THAT THE LOCATION REQUIRED HIM TO TAKE OFF UPSLOPE. HE STATED THAT THE RPM DROPPED SLIGHTLY, BUT REMAINED IN THE GREEN ARC DURING THE UPSLOPE PORTION OF THE TAKEOFF. AS THE HELICOPTER CROSSED A FENCE & THE TERRAIN STARTED SLOPING DOWNHILL, THE HELICOPTER FLEW OUT OF GROUND EFFECT. THE PLT RPRTD HE LEVELED THE HELICOPTER, THEN BEGAN A SLIGHT DSCNT TO INCREASE RPM & AIRSPEED. HOWEVER, THE ROTOR RPM DECAYED & JUST BEFORE TOUCHDOWN, THE HELICOPTER YAWED 90 DEG TO THE RIGHT. AFTER TOUCHDOWN, THE HELICOPTER ROLLED OVER. DENSITY ALT WAS ESTD TO BE 3216 FT.
Quoted verbatim from the NTSB record.
Other Bell 47 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 1 Nov 1990 | Bell 47J-2 | Gatlinburg, Tennessee, United States | Pigeon Forge Helicopters, Inc. | Serious injuries | - |
| 4 May 1990 | Bell 47G | Riverside, California, United States | Riverside Air Service | Minor injuries | - |
| 16 Jun 1990 | Bell 47G-3B1 | Cedar Rapids, Iowa, United States | Badger Helicopters, Inc. | Fatal | 3 |
| 2 Apr 1990 | Bell 47G-3B-2 | Hillsboro, Oregon, United States | Western Helicopter Service | Serious injuries | - |
| 15 Nov 1990 | Bell 47-G3-B | Nantucket, Massachusetts, United States | Firefly, Inc. | No injuries | - |
| 2 Sep 1990 | Bell 47G-3B1 | Canon City, Colorado, United States | - | Minor injuries | - |
All 1,633 records for this type
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 20 Jan 1990 | Boeing B737-300 | Cedar Rapids, Iowa, United States | United Airlines | No injuries | - |
| 16 Mar 1990 | Maule M4 | Creston, Iowa, United States | Johnson, Kenneth D. | No injuries | - |
| 26 Mar 1990 | Cessna 150 | Ankeny, Iowa, United States | Todd's Flying Service Inc. | No injuries | - |
| 21 Apr 1990 | Piper PA-22-150 | Eldora, Iowa, United States | Burri, Gregory D. | Minor injuries | - |
| 29 Nov 1990 | Piper PA-31T2 | Des Moines, Iowa, United States | Century Life of America | Fatal | 1 |
| 29 Apr 1990 | Cessna 172 | Ames, Iowa, United States | Nieman, Robert K. | Serious injuries | - |