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 DECK DOOR WILL NOT OPEN IN FLIGHT. WILL UNLOCK AND OPEN USING FLIGHT DECK DOOR UNLOCK SWICH ON PEDISTAL. MAINTENANCE REMOVED DEBRIS AND LUBRICATED THE FLIGHT DECK DOOR LOCKING MECHANISM AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.