# NTSB UNK64X4188: Bell 47G, N970B, Bakersfield, CA, September 27, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 27, 1964
- Place: Bakersfield, CA · BAKERSFIELD, CA
- Location: 35.3733° N, 119.0187° W: Placed by OpenAirDocs: center of Bakersfield, CA, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.3733&lon=-119.0187&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 27, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 184142
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X4188
- Page: https://openairdocs.org/ntsb/UNK64X4188

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0779  64/9/27    BAKERSFIELD CALIF   BELL 47G            CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 45, 11600
        TIME - 0930                    N970B               PX-  0  0  0  FERRY                     TOTAL HOURS, 405 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
        REMARKS- FATIGUE FAILURE EXHAUST ROCKER ARM BOLT NO3 CYL
```

## Aircraft

- Registration: [N970B](https://openairdocs.org/deregistered/N970B-2014-11-26), registration cancelled 2014-11-26, S/N 1311 (OpenAirDocs)
- Reported make and model: BELL 47G
- Registry model: [Bell 47G](https://openairdocs.org/model/bell-47g) (registry code 1181002) (OpenAirDocs)
- Registry engine: [Franklin 6V-335 series](https://openairdocs.org/engine/franklin-6v-335-series) (registry code 27039, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N970B (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 MIA93FA121](https://openairdocs.org/ntsb/MIA93FA121), May 16, 1993: Bell 47-G (N970B), Parker, FL, destroyed, 2 fatal. Probable cause: the misjudgement of the distance by the nonrated pilot-in-command and subsequent collision with a tree. Contributing to the accident was the lack of helicopter experience of the pilot-in-command.
- [NTSB MKC68A0049](https://openairdocs.org/ntsb/MKC68A0049), Feb 6, 1968: Bell 47G (N970B), Onawa, IA, destroyed

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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