# Accident 19740906032879A: Bell 47G3B1, Grand Valley, CO, September 6, 1974

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 6, 1974
- Place: Grand Valley, CO
- Airport: Private Heli Pad
- Damage: Destroyed
- Phase of flight: Forced/Precautionary Landing
- Aircraft: N1135W, a cancelled registration (https://openairdocs.org/deregistered/N1135W-1981-06-06) (OpenAirDocs)
- Registry model: Bell 47G-3B-1 (registry code 1181028, https://openairdocs.org/model/bell-47g-3b-1) (OpenAirDocs)
- Reported make and model: BELL 47G3B1
- Fatal injuries: 0
- Pilot flight hours: 11,500 total, 4,700 in this make and model, 0 in the last 90 days
- NTSB investigation: [NTSB DEN75FTE21](https://openairdocs.org/ntsb/DEN75FTE21) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19740906032879A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

TOO LOW FOR AUTOROTATION.CLUTCH LINING EXCESSIVLY WORN.NO OIL IN TANK.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB DEN75FTE21](https://openairdocs.org/ntsb/DEN75FTE21), Sep 6, 1974: Bell 47G3B1 (N1135W), Grand Valley, CO, substantial damage

## Other reports on N1135W (2)

Matched to the same aircraft by N-number and date.

- [Accident 19780903043389A](https://openairdocs.org/incident/19780903043389A), Sep 3, 1978: Bell 47G3B1 (N1135W), Pasadena, CA, Destroyed. Rear bearing,p/n ND77038,of eng tach gen,p/n an 5531-1,s/n 18747,ed.
- [Accident 19740604014939A](https://openairdocs.org/incident/19740604014939A), Jun 4, 1974: Bell 47G3B1 (N1135W), Stratford, WA, Destroyed. Flew into partially obscured wires ovr lake.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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