As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE FIRE LIGHT FAULT (B LOOP) ON TEST. ACCOMPLISHED ENG FIRE DETECTION TEST OPS NML. BITE CHECK OF FIRE DETECTION CONTROL MODULE SHOWS NO FAULTS. GVI OF NR 1 ENG FIRE LOOP AND HARNESS GOOD. NO DISCREPANCIES NOTED. ALL SYS OPS NML. GROUND VERIFICATION SATISFACTORY. REF MM 26 11 00.