NTSB Identification: OAK75AP011
14 CFR Part 91 General Aviation
Aircraft: BELL 47J-2A, registration: N3072G
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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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3-4207   74/9/9    RIPON,CALIF         BELL 47J-2A         CR-  0  1  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1012                    N3072G              PX-  2  0  0  MAPPING/PHOTO             AGE 32, 4700 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            124 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          STOCKTON,CALIF              NEW MELONE DAM,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: NORMAL CRUISE
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        FACTOR(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
         FIRE AFTER IMPACT
        REMARKS- TAIL ROTOR DRIVE SPLINED COUPLING FAILED.ACFT SPUN TO R AT LOW ALT.
Full narrative is not available


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