What was found
AFTER ENGINE START AT FIRST APPLICATION OF TAXI THRUST THE NR 2 ENGINE FUEL FILTER BYPASS LIGHT ILLUMINATED FOR APPROX 30 SECONDS THEN EXTINGUISHED. THE LIGHT DID NOT COME ON AGAIN WHILE TAXING TO ANOTHER GATE. GROUNDED - YES. EEC BITE SHOWS FAULT CODE 73-31072 FUEL FILTER SIGNALS DISAGREE. PEF FIM 73-05 TASK 801 UP TO STEP E, 1, A,1. PLUG DP0808 (J8) AND DP0803 SECURE. 35534. REMOVED AND REPLACED FUEL FILTER REF AMM 73-11-02. NO DEBRIS NOTED IN FILTER. REMOVED AND REPLACED FUEL FILTER DIFFERENTIAL PRESSURE SWITCH REF AMM 73-34-01. RAN ENGINE, LEAK AND OPS CHECK GOOD. PERFORMED EEC BITE, NO RECENT FAULTS NOTED.