NTSB Identification: OAK77FVM18
14 CFR Part 91 General Aviation
Aircraft: CESSNA 421A, registration: N1BV

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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3-1252  77/6/12  NR.MORGAN HILL,CA     CESSNA 421A         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 60, 2175
        TIME - 1230                    N1BV                PX-  0  0  3  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 1200 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BIG BEAR,CA                 SAN CARLOS,CA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           SYSTEMS - FLIGHT CONTROL SYSTEMS: ELEVATOR AND ELEVATOR TAB CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY SECURED
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
           MISCELLANEOUS ACTS,CONDITIONS - FLUTTER
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  PITCH CONTROL PROBLEM
                                  AIRFRAME BUFFET
        REMARKS- BOLT IN ELEVATOR TRIM TAB ACTUATING ROD DROPPED OUT DESTRUCTIVE FLUTTER FOLLOWED.

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