What was found
AIRCRAFT WAS GROUNDED: FLIGHT DECK DOOR WILL NOT OPEN. UPPER LATCH WILL NOT DISENGAGE. MAINTENANCE REPLACED FLIGHT DECK DOOR LOCK ASSEMBLY PER AMM 52-51-21. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: FLIGHT DECK DOOR WILL NOT OPEN. UPPER LATCH WILL NOT DISENGAGE. MAINTENANCE REPLACED FLIGHT DECK DOOR LOCK ASSEMBLY PER AMM 52-51-21. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.