NTSB Identification: SEA81DYA27
14 CFR Part 135 Nonscheduled operation of AIRWEST HELICO
Aircraft: AEROSPATLE SA316B, registration: N84850

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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3-2664  81/8/30  NR.DRIGGS,ID          AEROSPATLE SA316B   CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 36, 4560
        TIME - 1410                    N84850              PX-  0  0  0  AIR TAXI-CARGO            TOTAL HOURS, 920 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DRIGGS,ID                  DRIGGS,ID
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: HOVERING
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- TEETH OF SPLINED COUPLING GEAR,PN 3130-567-12-005,WORN EXCESSIVELY.

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