What was found
NR 1 ENGINE FLASHING LIGHT FOR THE OIL FILTER BYPASS CAME ON AFTER LEAVING RUNWAY AFTER LANDING. STEADY OIL FILTER BYPASS LIGHT REMAINED ON FOR THREE MINUTES. RAN QRH, LIGHT EXTINGUISHED ON ITS OWN. SHUTDOWN THE NR 1 ENGINE ON TAXI IN. ACFT GROUNDED. THE NR 1 ENGINE SHOWS LONG TIME FAULT 79-31121, THE OIL FILTER SIGNALS DISAGREE, FLT LEGS 1, 4, 6, 7, AND 10. REPLACED THE NR 1 ENGINE OIL FILTER CLOGGING TRANSMITTER IAW AMM 79-21-07. LEAK AND OPS CHECKED GOOD. COMPLETED T/C SBCFM56-7B-73-0219-1 FOR NR 1 ENGINE.