What was found
IN FLT, RT FUEL FILTER BYPASS CAME ON. LT FUEL FILTER BYPASS CAME ON APPROX 2 MIN`S LATER. INTERMITTENT UNTIL FL300, STAYED ON UNTIL PARKING & SHUTDOWN. LT BOOST PUMP ANNUNCIATED SHORT FINAL. (M2B) - TOOK FUEL SENDER FROM LT & RT WING SUMP & FUEL FILTER DRAIN FOR ANALYSIS. DRAINED & SUMPED ALL FUEL FROM BOTH TANKS & REPLACED BOTH AIRFRAME FUEL FILTERS & BOTH ENG FILTERS IAW MM 28-00-02, 28-21-05 & PWA MM 73-10-02. INSPECTED INSIDE BOTH FUEL TANKS & FOUND NO DEBRIS OR ON FUEL FILTERS. PUMPED FRESH FUEL INTO TANKS. GROUND RAN BOTH ENG`S, NO DEFECTS IN FUEL SYS OR LEAKS AT FILTERS OR FUEL TANK ACCESS PANELS IAW MM 28-10-00. ALSO VISUALLY VERFIIED PROPER PLACARDS TO BE INSTALLED AT A/C FUELING POINTS.