As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POST FLIGHT CREW REPORTED L2 WINDOW DIFFICULT TO CLOSE. UNWANTED MATERIAL CLEANED FROM GUIDE RAIL AND ROLLERS LUBED. OPERATIONAL CHECK OF L2 WINDOW CHECK GOOD PER BOEING AIRCRAFT MAINTENANCE MANUAL 56-11-02. NO ADDITIONAL FAULTS NOTED.