# NTSB UNK65X0200: Bell 47J2A, N1141W, Bodega Bay, CA, October 8, 1964

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: October 8, 1964
- Place: Bodega Bay, CA · BODEGA BAY, CA
- Location: 38.3325° N, 123.0301° W: Placed by OpenAirDocs: center of Bodega Bay, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.3325&lon=-123.0301&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 4 serious
- Status: Completed, report November 17, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 184174
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK65X0200
- Page: https://openairdocs.org/ntsb/UNK65X0200

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1033   64/10/8   BODEGA BAY CALIF    BELL 47J2A          CR-  0  1  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1515                    N1141W              PX-  0  3  0  AIR TAXI-PASSG            AGE 34, 9627 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            4 IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - SHELL CO.HELIPORT
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
          ROTORCFT-FAILURE MAIN ROTOR DRIVING FLANGE SCREWS
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - SHEARED
        FACTOR(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           ROTORCRAFT - MISCELLANEOUS UNITS AND ASSEMBLIES: DUAL TACHOMETER
           TERRAIN - ROUGH/UNEVEN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- ERRONEOUS ROTOR TACHOMETER DURING AUTOROTATION.
```

## Aircraft

- Registration: N1141W (not matched to a registry record)
- Reported make and model: BELL 47J2A
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Shell Co.Heliport

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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