NTSB Identification: Unknown
14 CFR Part 135 Nonscheduled operation of NATIONAL HELIC
Aircraft: BELL 47J2A, registration: N1141W

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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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.

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