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. KEYPAD, MANUAL LOCK AND FLIGHT DECK SWITCH WOULD NOT OPEN. NO FAILURE LIGHTS ON FLIGHT DECK DOOR CONTROL PANEL. MAINTENANCE FOUND LOOSE SCREWS ON FLIGHT DECK WALL ADJACENT TO DOOR THAT WERE INTERFERING WITH THE DOOR OPENING AND CLOSING. TIGHTENED SCREWS AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-51-11.