What was found
ON TAXI LEFT FUEL FILTER BYPASS LIGHT ILLUMINATED FOR 30 SECS. ENGINE WAS AT IDLE POWER. GROUNDED - YES. ACCOMPLISHED FIM 73-05 TASK 801 FOUND MAINT MESSAGE 73-31071. NR 1 ENG FUEL DIFFERENTIAL PRESSURE SWITCH CONNECTOR RUSTY. INSTALLED SERVICEABLE FUEL FILTER DIFFERENTIAL PRESS SWITCH REF AMM 73-34-01-400-801-F00. ALL OPS CHECKS AND LEAK CHECKS WERE GOOD REF AMM 71-00-800-811-F00. ACCOMPLISHED REPAIR CONFIRMATION PER FIM 73-05 TASK 801 STEP F.