As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT DECK DOOR WILL NOT OPEN USING HANDLE. MUST USE FLIGHT DECK DOOR SWITCH TO OPEN. MAINTENANCE FOUND THE FLIGHT DECK DOOR LATCH MECHAISM BROKEN AT THE CENTER LATCH ASSEMBLY AND REPLACED THE DOOR LATCH MECHANISM PER AMM 52-51-21. A SATISFACTORY OPERATIONAL CHECK.