What was found
AFTER LEVEL OFF, WITH ANTI-ICE OFF NR 3 ENG N1 ROLLED BACK TO 80 PERCENT, N2 89 PERCENT, OIL PRESSURE 50PSI, FUEL FLOW FLUCTATING 2000-2800 AND PPH EPR 1.4-1.6. TURNED ON ANTI-ICE, NO HELP OIL TEMP BEGAN TO RISE FROM 90 TO 120. THE CREW SHUTDOWN NR 3 ENG. THEY LANDED WITHOUT FURTHER INCIDENT. MX INSPECTED NR 3 ENG OIL FILTER WITH NO PROBLEMS, NR 3 FUEL FILTER WAS CLOGGED. REPLACED FUEL FILTER. WHEN PERFORMED MAX POWER INSP NR 3 ENG COOL DOWN OIL PRESSURE LIGHT ILLUMINATED, REPLACED OIL PRESSURE TRANSMITTER, ENGINE OIL TEMP SENSOR AND ENGINE OIL FILTER. OPS CHECK GOOD IAW MM 79-32-1, 79-34-1, 79-2-07, 79-33-1 AND ERH 70.01. ACFT WAS RETURNED TO SERVICE.