What was found
AIRCRAFT WAS GROUNDED: 4R DOOR BECAME DISARMED IN FLIGHT. FLIGHT ATTENDANT REPORTS THE HANDLE RAISED SLIGHTLY BUT REARMS WHEN HANDLE IS PUSHED DOWN. MAINTENANCE FOUND THE 4R DOOR FORWARD GIRT BAR FITTING ATTACHMENT BLANKING PLATE LOOSE, SECURED BLANKING PLATE AND ADJUSTED THE DOOR ARMING SYSTEM PER AMM 52-13-31-400-007-A / 52-13-00-820-001-A. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS OR ISSUES NOTED.