As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE FIRE LOOP A ILLUMINATED DURING DESCENT, EXTINGUISHED ON LANDING. REMOVED AND REPLACED THE NR 1 ENGINE FIRE LOOP A AFT FIRE DETECTOR IAW AMM 25-12-17-04 CONF 21. PERFORMED OPERATIONAL TEST OF ENGINE FIRE DETECTION SYSTEM IAW AMM 26-12-00-710-001. NO FAULTS, OK FOR SERVICE.