# NTSB DEN76FTE18: Bell 47G3B1, N90769, Denver, CO, August 24, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 24, 1975
- Place: Denver, CO · DENVER, CO
- Location: 39.7392° N, 104.9847° W: Placed by OpenAirDocs: center of Denver, CO, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7392&lon=-104.9847&mi=10
- Phase of flight: [Emergency descent](https://openairdocs.org/ntsb-phases/600) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report November 21, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 151082
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN76FTE18
- Page: https://openairdocs.org/ntsb/DEN76FTE18

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3201  75/8/24    DENVER,CO           BELL 47G3B1         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1845                    N90769              PX-  0  0  0  DUAL                      AGE 27, 1692 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            106 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - SKY RANCH
        DEPARTURE POINT             INTENDED DESTINATION
          DENVER,CO                   ENGLEWOOD,CO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: AUTOROTATIVE DESCENT
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - MISJUDGED SPEED AND ALTITUDE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- ENGINE STOPPED PURING AUTOROTATION,REASON UNKNOWN.ENG OPERATION NORMAL AFTER ACCIDENT.
```

## Aircraft

- Registration: [N90769](https://openairdocs.org/deregistered/N90769-2013-07-09), registration cancelled 2013-07-09, S/N 2901, built 1963 (OpenAirDocs)
- Reported make and model: BELL 47G3B1
- Registry model: [Bell 47G-3B-1](https://openairdocs.org/model/bell-47g-3b-1) (registry code 1181028) (OpenAirDocs)
- Registry engine: [Lycoming TVO-435-GIA](https://openairdocs.org/engine/lycoming-tvo-435-gia) (registry code 41526, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Sky Ranch

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19750824027269A](https://openairdocs.org/incident/19750824027269A), Aug 24, 1975: Bell 47G3B1, Denver, CO, Substantial damage. Engine stopped puring autorotation,reason unknown. Eng operation normal after accident.

## Other investigations on N90769 (2)

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 DEN84LA079](https://openairdocs.org/ntsb/DEN84LA079), Jan 31, 1984: Bell 47G-3B-1 (N90769), Ogden, UT, substantial damage
- [NTSB SEA78DTA18](https://openairdocs.org/ntsb/SEA78DTA18), Aug 20, 1978: Bell 47G3B1 (N90769), Billings, MT, substantial damage

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.