Narrative:

Upon initiation of takeoff roll, cockpit noise was greater than usual. At approximately 50-60 KIAS, first officer noticed that captain's side window was not locked closed. Attempt was made to close window. Unable to do so, abort was initiated at approximately 90 KIAS. Window was closed, required brake cool down time completed, and uneventful takeoff and flight completed. Since the checklist calls for windows closed in 2 places, cause of problem can be attributed to lack of proper checklist discipline. Even though the checklist was read and answered properly, the crew members both failed to insure that the window was in fact closed and locked. Solution would be to insure that each item on the checklist is not only read and answered properly but that the item is actually accomplished. Strict checklist discipline is the key. Supplemental information from acn 267360: the airplane had been with the mechanics for several hours. I was not methodical enough in my cockpit setup and missed the 'window locked' handle being out of position, even though I recall looking right at it.

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Original NASA ASRS Text

Title: THE COCKPIT SIDE WINDOW CAME OPEN ON TKOF ROLL.

Narrative: UPON INITIATION OF TKOF ROLL, COCKPIT NOISE WAS GREATER THAN USUAL. AT APPROX 50-60 KIAS, FO NOTICED THAT CAPT'S SIDE WINDOW WAS NOT LOCKED CLOSED. ATTEMPT WAS MADE TO CLOSE WINDOW. UNABLE TO DO SO, ABORT WAS INITIATED AT APPROX 90 KIAS. WINDOW WAS CLOSED, REQUIRED BRAKE COOL DOWN TIME COMPLETED, AND UNEVENTFUL TKOF AND FLT COMPLETED. SINCE THE CHKLIST CALLS FOR WINDOWS CLOSED IN 2 PLACES, CAUSE OF PROB CAN BE ATTRIBUTED TO LACK OF PROPER CHKLIST DISCIPLINE. EVEN THOUGH THE CHKLIST WAS READ AND ANSWERED PROPERLY, THE CREW MEMBERS BOTH FAILED TO INSURE THAT THE WINDOW WAS IN FACT CLOSED AND LOCKED. SOLUTION WOULD BE TO INSURE THAT EACH ITEM ON THE CHKLIST IS NOT ONLY READ AND ANSWERED PROPERLY BUT THAT THE ITEM IS ACTUALLY ACCOMPLISHED. STRICT CHKLIST DISCIPLINE IS THE KEY. SUPPLEMENTAL INFO FROM ACN 267360: THE AIRPLANE HAD BEEN WITH THE MECHS FOR SEVERAL HRS. I WAS NOT METHODICAL ENOUGH IN MY COCKPIT SETUP AND MISSED THE 'WINDOW LOCKED' HANDLE BEING OUT OF POS, EVEN THOUGH I RECALL LOOKING RIGHT AT IT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.