As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AFT LAVATORY ON CAPTAIN'S SIDE THE DOOR WILL NOT OPEN WHEN SOMEONE IS INSIDE AND LOCKS THE DOOR. LAVATORY DOORS ARE DESIGN TO OPERATE AS DESCRIBED ON THE DISCREPANCY. NO FAULTS NOTED DOOR OPERATES NORMAL. PER CMM: 25-40-64.