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 FROM OUTSIDE. LOCK FAIL LIGHT ILLUMINATED ON FLIGHT DECK. TROUBLESHOT AND FOUND STRIKER LOCK BROKEN. REMOVE AND REPLACED STRIKER LOCK. GROUND OPERATIONAL CHECK GOOD FOUND SATISFACTORY AT THIS TIME. PER AMM 52-51-18.