As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR 1L FORWARD WINDOW FOR GIRT BAR FLAG ON RIGHT SIDE (NOSE) SIDE DOES NOT FULLY SHOW YELLOW FLAG IN THE WINDOW WHEN 1L DOOR ARMED. DIFFICULT TO TELL IN THAT WINDOW IF YELLOW FLAG SHOWN IN WINDOW WHEN DOOR IS ARMED. CLEANED THE GIRT BAR FLAG VIEWPORTS FOR THE L1 DOOR, YELLOW FLAGS ARE NOW CLEARLY VISIBLE WHEN DOOR IS ARMED, REF MM 52-11-00-2.