What was found
1) #3 FUEL BYPASS LIGHT ILLUMINATED IN FLIGHT. PERFORMED ABNORMAL PROCEEDURE AND LIGHT EXTINGUISHED. BYPASS LIGHT ILLUMINATED A SECOND TIME AND WOULD NOT EXTINGUISH. FUEL FILTER BYPASS RESET LIGHT INOPERATIVE.2) FOUND #3 ENGINE FUEL FILTER CONTAMINATED. REMOVED AND REPLACED FILTER IAW M/M 73-10-2. OPS CHECKED GOOD DURING GROUND RUN. RELAMPED FUEL FILTER BYPASS RESET LIGHT SWITCH. OPS CHECKED OK IAW TR 73-24, 73-34-0.