NTSB Identification: ANC66A0052
14 CFR Part 135 Nonscheduled operation of ERA HELICOPTER
Aircraft: SIKORSKY S55, registration: N874

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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2-0569  66/6/29  NR.KENAI ALAS         SIKORSKY S55        CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1434                    N874                PX-  0  0  0  AIR TAXI-CARGO            AGE 44, 2156 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            618 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - SHELL PLATFORM A
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           TURBULENCE                                               STATIC: IDLING ROTORS
        PROBABLE CAUSE(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      55
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           15                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- STRONG UPDRAFT WINDS ALONG SIDES OF PLATFORM CAUSED MAIN ROTOR TO STRIKE TAIL BOOM.

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