NTSB Identification: LAX69F0027
14 CFR Part 91 General Aviation
Aircraft: BELL 47D1, registration: N12512

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1851  68/6/21    CRONA D MAR,CALIF   BELL 47D1           CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1000                    N12512              PX-  0  0  0  DUAL                      AGE 35, 1160 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            ALL IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - ORANGE COUNTY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: AUTOROTATIVE DESCENT
        PROBABLE CAUSE(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
          ROTORCFT-TAIL ROTOR GRIP RETAINING BOLT.
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           ROTORCRAFT - ROTOR ASSEMBLIES: TAIL ROTOR BLADES
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
           MISCELLANEOUS ACTS,CONDITIONS - OUT OF BALANCE
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  DIRECTIONAL CONTROL PROBLEM
                                  PROP/ENGINE VIBRATION
        REMARKS- TAIL ROTOR TRANSMISSION ALSO SEPARATED.

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