As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: BIFOLD DOOR ON LAVATORY D AFT LEFT VERY DIFFICULT TO OPEN AND CLOSE. FOUND DOOR THRESHOLD SCREWS LOOSE AND DOOR HAD DIFFICULTY SLIDING ACROSS THRESHOLD DURING OPEN AND CLOSE. SECURED SCREWS AND CLEANED STICKY SUBSTANCE OFF THRESHOLD.