What was found
ON TAXI OUT NR 1 ENGINE FILTER BYPASS LIGHT ILLUMINATED. PERFORMED EEC BITE IAW FIM 73-05 TASK 801. FOUND NR 1 ENGINE FILTER BYPASS NO MESSAGE WITH ASSOCIATED FAULT 73-31071 INDICATING A FAULT WITH THE FUEL FILTER BYPASS WARNING SYSTEM. VERIFIED FUEL FILTER DIFF PRESSURE SWITCH BAD PIN 2 TO 3 OPEN PIN 2 TO 1 OPEN. REF SSM 73-31-11. REPLACED NO NR 1 ENG FUEL DIFFERENTIAL PRESSURE SWITCH REF MM 73-34-01. PERFORMED FUEL DIFF PRES SWITCH INST TEST REF MM 73-34-01 NO DEFECTS NOTED. PERF EEC TEST TASK 73-21-00-700-804 F00, NO DEFECTS NOTED. PERFORMED IDLE POWER LEAK CHECK REF MM 71-00-00-700-801-F00, NO LEAKS NOTED.