What was found
ON INITIAL ACCELERATION AT HUX, L-2 WINDOW CAME OPEN. ABORTED TAKEOFF, RESHUT WINDOW, AND ALL INDICATION WERE NORMAL ON SECOND TAKEOFF (PACKS OFF TAKE-OFF). OPENED L-2 WINDOW AND INSPECTED TRACK AND LOCKING MECHANISM, CYCLED WINDOW SEVERAL TIMES AND FOUND IT TO LOCK NORMALLY. NO OTHER DEFECTS NOTED. OK FOR SERVICE.