NTSB Identification: NYC75AN070
14 CFR Part 91 General Aviation
Aircraft: BOEING 727, registration: N274US

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 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
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1-0031   74/12/1 NR.THIELLS,NY         BOEING 727          CR-  3  0  0  FERRY                     AIRLINE TRANSPORT, AGE
        TIME - 1926                    N274US              PX-  0  0  0                            35, 7434 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            1973 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        OPERATOR - NORTHWEST AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          NEW YORK,NY                 BUFFALO,NY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL: SPIRAL                                            IN FLIGHT: CLIMB TO CRUISE
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           SYSTEMS - OTHER SYSTEMS: PITOT SYSTEM
           WEATHER - ICING CONDITIONS-INCLUDES SLEET,FREEZING RAIN,ETC.
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
        FACTOR(S)
           AIRFRAME - FLIGHT CONTROL SURFACES: HORIZONTAL STABILIZER, ATTACHMENTS
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        WEATHER BRIEFING - COMPANY DISPATCH
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          BROKEN                                                    2500
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     SLEET
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      34
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
           70                                                       14
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          IFR                                                      IFR
        REMARKS- PITOT HEAT SWITCH NOT ON. FAILED TO RECOGNIZE PITOT ICG.LOST CTL.L HRZNTL STAB FAILED.

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