# NTSB UNK64X2939: Bell 47G3B, N73915, Lake City, CO, July 20, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 20, 1964
- Place: Lake City, CO · LAKE CITY, CO
- Location: 38.0231° N, 107.3113° W: Placed by OpenAirDocs: center of Lake City, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.0231&lon=-107.3113&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report August 27, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 182565
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X2939
- Page: https://openairdocs.org/ntsb/UNK64X2939

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0467  64/7/20  NR.LAKE CITY COLO     BELL 47G3B          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 44, 2200
        TIME - 1200                    N73915              PX-  0  0  1  CTR PASSG-D               TOTAL HOURS, 800 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
          PWR PLT-TURBO MALFUNCTN CAUSED BY HEAT EROSION.
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
           MISCELLANEOUS ACTS,CONDITIONS - BINDING
           MISCELLANEOUS ACTS,CONDITIONS - OVERHEATED
           MISCELLANEOUS ACTS,CONDITIONS - WARPED
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
```

## Aircraft

- Registration: [N73915](https://openairdocs.org/deregistered/N73915-2014-11-17), registration cancelled 2014-11-17, S/N 2788, built 1963 (OpenAirDocs)
- Reported make and model: BELL 47G3B
- Registry model: [Bell 47G-3B](https://openairdocs.org/model/bell-47g-3b) (registry code 1181026) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N73915 (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 OAK68A0012](https://openairdocs.org/ntsb/OAK68A0012), Aug 11, 1967: Bell 47G3B (N73915), Big Meadows, CA, substantial damage
- [NTSB DEN65A0054](https://openairdocs.org/ntsb/DEN65A0054), Feb 8, 1965: Bell 47G3B (N73915), Durango, 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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