# NTSB SEA76FTI02: Bell 47G3B1, N1170W, Elliston, MT, July 9, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 9, 1975
- Place: Elliston, MT · ELLISTON, MT
- Location: 46.5587° N, 112.4638° W: Placed by OpenAirDocs: center of Elliston, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.5587&lon=-112.4638&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 9, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 150031
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA76FTI02
- Page: https://openairdocs.org/ntsb/SEA76FTI02

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2605   75/7/9  NR.ELLISTON,MT        BELL 47G3B1         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 30, 2313
        TIME - 0845                    N1170W              PX-  0  0  0  MAPPING/PHOTO             TOTAL HOURS, 460 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          HELENA,MT                   FLINT CRK MTN RANGE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - IGNITION SYSTEM: MAGNETOS
           POWERPLANT - IGNITION SYSTEM: HIGH TENSION WIRING
           MISCELLANEOUS - EVASIVE MANEUVER TO AVOID COLLISION
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
           MISCELLANEOUS ACTS,CONDITIONS - PILOT FATIGUE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- ROUGH RUNNING ENG.EXTENDED FLARE TO CLR FENCE.CRACKED DIST BLK L MAG,DMGD HI TENSION LD RECEPTACLE
```

## Aircraft

- Registration: [N1170W](https://openairdocs.org/deregistered/N1170W-2021-08-12), registration cancelled 2021-08-12, S/N 2944, built 1965 (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: [Allison 250 series](https://openairdocs.org/engine/allison-250-series) (registry code 03014, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## 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 19750709018089A](https://openairdocs.org/incident/19750709018089A), Jul 9, 1975: Bell 47G3B1, Elliston, MT, Substantial damage. Rough running eng. Extended flare to clr fence. Cracked dist blk l mag,dmgd hi tension ld receptacle

## Other investigations on N1170W (3)

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 CEN19TA280](https://openairdocs.org/ntsb/CEN19TA280), Aug 20, 2019: Bell 47G (N1170W), Montrose, CO, substantial damage. Probable cause: A loss of engine power due to fuel starvation, which resulted from attitude-induced unporting of the fuel.
- [NTSB DEN82FTM02](https://openairdocs.org/ntsb/DEN82FTM02), Nov 5, 1981: Soloy 47 (N1170W), Fruitland, UT, substantial damage
- [NTSB DEN75AD022](https://openairdocs.org/ntsb/DEN75AD022), Oct 26, 1974: Bell 47G3B1 (N1170W), Vernal, UT, 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.