As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW REPORTED THAT THE FLIGHT DECK DOOR REMAINS LOCKED AND DIFFICULT TO UNLOCK WITH UNLOCK INDICATION ILLUMINATED. MAINTENANCE LUBRICATED THE FLIGHT DECK DOOR LATCHES AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-51-00.