What was found
A/C DEPARTED RDU ENROUTE FOR ATL, ON CLIMBOUT CREW RECEIVED A PAX DOOR OUTER HANDLE CAUTION MESSAGE. A/C RETURNED TO RDU. MAINTENANCE INSPECTED DOOR FOR ANY DEFECTS. MAINTENANCE THEN CLEANED AND LUBRICATED PAX DOOR INNER HANDLE AND PERFORMED OPERATIONAL TEST OF PAX DOOR IAW CL-65 AMM 52-70-04. NO FAULT NOTED AT THIS TIME. A/C THEN DEPARTED RDU FOR ATL WITH NO FURTHER PROBLEMS.