# NTSB DEN66A0021: Bell 47G3, N73913, South Fork, CO, September 14, 1965

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: September 14, 1965
- Place: South Fork, CO · SOUTH FORK, CO
- Location: 37.6692° N, 106.6429° W: Placed by OpenAirDocs: center of South Fork, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.6692&lon=-106.6429&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report November 19, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 176344
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN66A0021
- Page: https://openairdocs.org/ntsb/DEN66A0021

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0608  65/9/14  NR.SOUTH FORK COLO    BELL 47G3           CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0900                    N73913              PX-  0  0  0  CONSTRUCTION              AGE 43, 6602 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1439 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: OTHER
           COLLIDED WITH: TREES                                     IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
          MISC-SLING RELEASE MALFUNCTIONED,CAUSE UNDETERMIND
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        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                                                      55
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          270                                                       5
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- POWER LOSS WHILE CARRYING UTILITY POLE ON SLING
```

## Aircraft

- Registration: [N73913](https://openairdocs.org/deregistered/N73913-1972-02-28), registration cancelled 1972-02-28, S/N 2602 (OpenAirDocs)
- Reported make and model: BELL 47G3
- Registry model: [Bell 47G-3](https://openairdocs.org/model/bell-47g-3) (registry code 1181024) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: 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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