As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 2730 THE CREW REPORTED THE FLIGHT ATTENDANT WAS UNABLE TO OPEN LAV FIRE EXTINGUISHER ACCESS PANEL. THE AIRCRAFT WAS REMOVED FROM SERVICE. OPENED FIRE EXTINGUISHER DOOR, NO FURTHER ACTION REQUIRED. NO PARTS REMOVED OR REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.