What was found
ON FLT NR 530 - ATL- AIR RETURN, NR 2 ENGINE OIL FILTER CLOG LIGHT CAME ON IN FLIGHT. REPLACED NR 2 ENGINE OIL FILTER. INSPECTED FILTER FOR METAL AND OTHER DEBRIS, NO DEFECTS NOTED, FOUND DIFFERENTIAL PRESSURE SWITCH STUCK CLOSED. REMOVED AND REPLACED SWITCH, RAN NR 2 ENGINE. OPS CHECK NORMAL, LEAK CHECK OK. (M)