# NTSB SEA67A0027: Bell 47G3B1, N1169W, W.Yellowston, MT, September 21, 1966

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: September 21, 1966
- Place: W.Yellowston, MT · W.YELLOWSTON, MT
- Location: 44.6622° N, 111.1070° W: Placed by OpenAirDocs: center of West Yellowstone, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.6622&lon=-111.1070&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal, 1 serious
- Status: Completed, report June 14, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 120987
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA67A0027
- Page: https://openairdocs.org/ntsb/SEA67A0027

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1105  66/9/21  NR.W.YELLOWSTON MONT  BELL 47G3B1         CR-  1  0  0  COMMERCIAL                COMMERCIAL, AGE 43, 4983
        TIME - 1245                    N1169W              PX-  1  1  0  CTR PASSG-D               TOTAL HOURS, 3452 IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: POWER-ON DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED SPEED AND ALTITUDE
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           WEATHER - HIGH DENSITY ALTITUDE
        MISSING AIRCRAFT - LATER RECOVERED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      68
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           15                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
         FIRE AFTER IMPACT
        REMARKS- RECOVERY DATE 9/22/66.AFTER LOSING LIFT AT LOW ALT PLT TURNED TO LEFT DOWNSLOPE.NEAR MAX GROSS WT.
```

## Aircraft

- Registration: [N1169W](https://openairdocs.org/aircraft/N1169W), registered now, S/N 2943, built 1966 (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: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed

## Other investigations on N1169W (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 FTW96LA356](https://openairdocs.org/ntsb/FTW96LA356), Aug 23, 1996: Bell 47 Soloy (N1169W), Intracoastal, LA, destroyed. Probable cause: the loss of aircraft control by unknown person(s).
- [NTSB DEN75DTE62](https://openairdocs.org/ntsb/DEN75DTE62), Apr 12, 1975: Bell 47G3B1 (N1169W), Craig, CO, 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.

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