# NTSB DEN75ATM08: Bell 47G-3B, N73218, Kamas, UT, December 16, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 16, 1974
- Place: Kamas, UT · KAMAS, UT
- Location: 40.6563° N, 111.2638° W: Placed by OpenAirDocs: center of Kamas, UT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.6563&lon=-111.2638&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 27, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 145017
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN75ATM08
- Page: https://openairdocs.org/ntsb/DEN75ATM08

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4068  74/12/16 NR.KAMAS,UT           BELL 47G-3B         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 33, 2932
        TIME - 1530                    N73218              PX-  0  0  0  CTR PASSG-D               TOTAL HOURS, 200 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         KAMAS,UT                     OAKLEY,UT
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: VERTICAL
           COLLIDED WITH: TREES                                     LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - EXHAUST SYSTEM: CLAMPS
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
           MISCELLANEOUS ACTS,CONDITIONS - MISSING
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- TURBO SYS LOST DUE FAILED TURBO EXHAUST CLAMP.
```

## Aircraft

- Registration: [N73218](https://openairdocs.org/deregistered/N73218-2013-07-08), registration cancelled 2013-07-08, S/N 2750, built 1962 (OpenAirDocs)
- Reported make and model: BELL 47G-3B
- Registry model: [Bell 47G-3B](https://openairdocs.org/model/bell-47g-3b) (registry code 1181026) (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

## 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 19741216041289A](https://openairdocs.org/incident/19741216041289A), Dec 16, 1974: Bell 47G3B, Kamas, UT, Substantial damage. Turbo sys lost due failed turbo exhaust clamp.

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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