NTSB Identification: OAK78FVM46
14 CFR Part 91 General Aviation
Aircraft: BELL 47D1, registration: N78900

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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3-2724  78/9/17  NR.CASTROVILLE,CA     BELL 47D1           CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0900                    N78900              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   AGE 48, 4000 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            3000 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         CASTROVILLE,CA               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      TAKEOFF: VERTICAL
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           MISCELLANEOUS - UNDETERMINED
        FACTOR(S)
           POWERPLANT - PROPELLER AND ACCESSORIES: BLADE RETENTION MECHANISM
           MISCELLANEOUS ACTS,CONDITIONS - LOOSE,PART/FITTING
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  PITCH CONTROL PROBLEM
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - FERRY
          PILOT' S SEAT BELT -FASTENED-PROPERLY
        REMARKS- COLLECTIVE PITCH BECAME UNCONTROLLABLE.MAIN ROTOR SHAFT AND RETAINING NUT SCUFFED AND OUT OF ROUND

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