NTSB Identification: Unknown
14 CFR Part 121 Scheduled operation of WIEN ALASKA AIRLINES INC
Aircraft: PIL-PORTER PC-6A, registration: N1421Z

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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1-0065  64/11/28 NR.HUGHES ALAS        PIL-PORTER PC-6A    CR-  0  0  1  SCHED DOM PASSG SRV       COMMERCIAL, AGE 36, 5663
        TIME - 1055                    N1421Z              PX-  0  0  4                            TOTAL HOURS, 263 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        OPERATOR - WIEN ALASKA AIRLINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: MAIN GEAR-SHOCK ABSORBING ASSY,STRUTS,ATTACHMENTS,ETC.
           MISCELLANEOUS ACTS,CONDITIONS - FROZEN, MOISTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           WEATHER - TURBULENCE IN FLIGHT,CLEAR AIR
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        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                  WIND VELOCITY-KNOTS
          NONE                                                     CALM
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      VFR
        REMARKS- SUDDEN INFLIGHT RELEASE OF STRUT WHICH WAS FROZEN IN COMPRESSED POSITION-WATER GOT IN STRUT TUBE

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