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 DIFFICULT TO OPEN AND CLOSE. FLIGHT CREW REPORTED THAT THE WINDOW SLIDES FINE. RED BAND DOES NOT FULLY SHOW WHEN CLOSED. MAINTENANCE ADJUSTED THE SLIDING WINDOW PER AMM 56-12-11.