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 CANNOT BE OPENED FROM INSIDE. UPPER AND LOWER LATCHES DO NOT RETRACT WHEN KNOB IS TURNED. MAINTENANCE REPLACED THE FLIGHT DECK DOOR LATCH MECHANISM PER AMM 52-51-21 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.