What was found
DURING CRUISE FLIGHT, #1 ENG FUEL FILTER BYPASS LIGHT ILLUMINATED. GROUNDED - YES. PER SEAMC R/R FUEL FILTER REF B737-900 AMM 73-11-02, NO LEAKS NOTED, FILTER BYPASS ILLUMINATED DURING ENGINE RUN. PERFORMED B737-900 FIM 73-05 TASK 801 FOUND FILTER BYPASS STATUS CLOGGED AND NO SIGNALS DISAGREE MAINTENANCE MESSAGES, R/R FUEL FILTER DIFFERENTIAL PRESSURE SWITCH REF AMM 73-34-01, NO LEAKS NOTED, LIGHT DID NOT ILLUMINATE DURING ENGINE RUN.