# NTSB DEN72DTE19: Bell 47G3B1, N73978, Minturn, CO, August 13, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 13, 1971
- Place: Minturn, CO · MINTURN, CO
- Location: 39.5356° N, 106.3816° W: Placed by OpenAirDocs: center of Minturn, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.5356&lon=-106.3816&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report March 31, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 162789
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN72DTE19
- Page: https://openairdocs.org/ntsb/DEN72DTE19

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3015  71/8/13    MINTURN,COLO        BELL 47G3B1         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 33, 3673
        TIME - 1010                    N73978              PX-  0  0  2  CTR PASSG-D               TOTAL HOURS, 3650 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MO LAKE 3                   MO LAKE 1
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: OBJECT                                    TAKEOFF: RUNNING
           ROLL OVER                                                TAKEOFF: RUNNING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           WEATHER - HIGH DENSITY ALTITUDE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - DOWNWIND
        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                  WIND VELOCITY-KNOTS
          NONE                                                      10
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- ATMTD TKOF AT NEAR GROSS WT,DENSITY ALT 13000FT.LOST RPM,HIT EMBANKMENT,ROLLED OVR TO INVERTED POS
```

## Aircraft

- Registration: [N73978](https://openairdocs.org/deregistered/N73978-1976-06-02), registration cancelled 1976-06-02, S/N 2826 (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)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N73978 (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 DEN74FTE21](https://openairdocs.org/ntsb/DEN74FTE21), Sep 13, 1973: Bell 47G3B1 (N73978), Pitkin, 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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