NTSB Identification: SEA81FA050
14 CFR Part 91 General Aviation
Aircraft: SIKORSKY S-58B, registration: N4247

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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3-3276   81/8/7    BELLEVUE,WA         SIKORSKY S-58B      CR-  2  0  0  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 0825                    N4247               PX-  0  0  0  CONSTRUCTION              42, 9500 TOTAL HOURS, 380
                                       DAMAGE-DESTROYED    OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          SEATTLE,WA                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: HOVERING
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPERLY SERVICED AIRCRAFT (GROUND CREW)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR GEAR BOX
           MISCELLANEOUS - FOREIGN OBJECT DAMAGE
           MISCELLANEOUS ACTS,CONDITIONS - RPM-UNCONTROLLABLE-OVERSPEED
           POWERPLANT - COOLING SYSTEM: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD
         FIRE AFTER IMPACT
        REMARKS- FOD TO INPUT GR,MAIN BEVEL GR.OIL COOLER REPLACED 5/5.SERVICING AT OIL FILLER OPENS MRGB CASE.

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