What was found
DESCENDING OUT OF FL310 WE GOT AN OIL CLOG LIGHT ON NR 1 ENGINE. COMPLIED WITH PROCEDURES, SHUTDOWN NR 1 ENGINE. ALL OIL PRESSURES INDICATED NORMAL BEFORE AFTER SHUTDOWN. AFTER ENGINE SHUTDOWN NR 1 OIL CLOG LIGHT REMAINED ON. T/S IAW TSM 79-00-00, FIG 109, REMOVED CONNECTOR FROM S299 NR 1 OIL DIFFERENTIAL PRESSURE SWITCH AND OIL CLOG LIGHT WENT OUT. R & R NR 1 ENGINE OIL DIFFERENTIAL PRESSURE SWITCH IAW A310 AMM 79-35-11-04. RAN NR 1 ENGINE IAW A310 JRH. SWITCH LEAK CHECKED OK. OIL CLOG LIGHT STAYED OFF DURING RUN AND OIL PRESSURE WAS NORMAL. ACFT OK FOR SERVICE.