What was found
AFTER LANDING NR 1 ENGINE OIL FILTER BYPASS LIGHT ILLUMINATED. ACFT GROUNDED. PERFORMED BITE CHECK, NOTED MSG 79-31121 OIL FILTER SIGNAL DISAGREE NR 1 ENGINE. REF TASK 79-05, TASK 817. PERFORMED TASK 79-21, TASK 806, H, 1-10 NO DEFECTS NOTED. PERFORMED FIM TASK 79-21, TASK 806 AND FIM TASK 79-21, TASK 817, FOUND FILTER BYPASS NOT CLOGGED. FIM TASK 79-21, TASK 806 LINE H, NR 11 REPLACE OIL FILTER CLOGGING TRANSMITTER. NO LEAKS OR FAULTS NOTED. REF AMM 79-21-07-400-801-F00.