As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR ENGINE B FIRE LOOP FAILED A TEST. ACFT GROUNDED. REMOVED AND REPLACED BOTH TOP LUG TERMINALS (FOUND ONE BAD AND THE OTHER ONE QUESTIONABLE) FOR THE RIGHT CORE FIRE DETECTOR IAW AMM 26-11-02. REMOVED AND REPLACED RIGHT CORE FIRE DETECTOR AS PRECAUTION IAW AMM 26-11-01. ACCOMPLISHED NR 2 ENGINE FIRE DETECTION TEST IAW AMM 26-11-00, OPS CHECKED GOOD.