What was found
DURING TAXI FOR TAKEOFF WITH BOTH ENGINES AT IDLE RIGHT FILTER BYPASS LIGHT ILLUMINATED AND REMAINED ON FOR APPROX 15 SECONDS. LIGHT THEN WENT OUT. WARNING LIGHT CHECK ON. PREFLIGHT WAS NORMAL. AFTER LIGHT OUT DID ANOTHER LIGHTS TEST AND INDICATION NORMAL. UNABLE TO DUPLICATE RIGHT FUEL FILTER BYPASS LIGHT DISCREPANCY ON THE GROUND. EEC BITE SHOWS NO CURRENT FAULT BUT FAULT HISTORY SHOWS MSG 73 31072 ONLY AT 3RD FLIGHT LEGS. ACCOMPLISHED FIM TASK 73 31 00 810 802 F00. FOUND S241 CONNECTOR DIRTY. CLEANED DP0803. REMOVED AND REPLACED NR 2 ENG FUEL FILTER DIFFERENTIAL PRESSURE SWITCH IAW AMM 73 34 01 PAGE BLOCK 401 FOR PRECAUTIONARY. OPS CHECK LEAKS CHECK AND EEC BITE ARE NORMAL.