As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT DECK LEFT HAND SLIDING WINDOW DOES NOT OPERATE NORMALLY AND SMOOTHLY. VERY DIFFICULT TO OPEN AND CLOSE. MECHANISM FEELS AS IF IT IS BINDING. TOP INDICATOR BUTTON IS SLOW TO POP UP. MAINTENANCE ADJUSTED THE SLIDING WINDOW HANDLE AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 56-12-11