As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE NR 2 FIRE DETECT LOOP A WILL NOT TEST. GROUNDED - YES. ACCOMPLISHED ENGINE FIRE DETECT BITE, NO FAULT NOTED REF FIM 26-10 TASK 801 CLEANED TERMINALS BLOCKS FOR NR 2 ENGINE FIRE DETECTORS. ENGINE FIRE DETECT OPS CHECK NORMAL REF AMM 26-11-00.