As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 FUEL FILTER BYPASS LIGHT ILLUMINATED ON TAXI. ACFT GROUNDED. FOUND CONNECTOR PLUG FOR NR 2 ENGINE FUEL DIFFERENTIAL PRESSURE SWITCH LOOSE AND COVERED WITH SURFACE CORROSION. CLEANED CONNECTOR AND SWITCH. RESECURED CONNECTOR AND PERFORMED NR 2 ENGINE RUN, NO FAULTS NOTED ALSO RAN EEC BITE AND EEC RECENT FAULTS TEST NO FAULTS. (MM REF 73-21-00).