What was found
AFTER LANDING, NR 2 FUEL FILTER BYPASS LIGHT ILLUMINATED. LIGHT WENT OUT AFTER ENGINE SHUTDOWN. ACFT GROUNDED. PERFORMED FIM 73-05 TASK 801. FOUND FAULT 73-31072. REPLACED NR 2 ENGINE FUEL FILTER IAW AMM 73-11-02. NO CONTAMINATION FOUND DURING REPLACEMENT. LEAK CHECKED GOOD. ACCOMPLISHED FIM 73-31, TASK 802, CONNECTOR IS GOOD, FUEL FILTER DIFFERENTAL SWITCH CHECKS BAD. REMOVED FUEL FILTER DIFFERENTIAL PRESSURE SWITCH IAW MM 73-34-01-000-801-F00. INSTALLED A NEW DIFFERENTIAL PRESSURE SWITCH IAW MM 73-34-01-400-801-F00. PERFORMED FUEL FILTER DIFFERENTIAL PRESSURE SWITCH TEST IAW MM 73-34-01-400-801-F00, PARA F SWITCH TEST PASSED. FAULT 73-71072 CLEARED. LEAK CHECKED GOOD. EEC TEST PASSED IAW MM 73-21-00-700-804-F00. EEC TEST PASSED. NE EEC FAULTS NOTED.