As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRE DETECTOR NR 3 FAULT ILLUMINATED ON STATUS PAGE AT TOP OF DESCENT. T/S PER FIM 26-11-00-101. CONFIRMED FIRE LOOP DH23 IS INOP AND RESPONDER BROKEN. REMOVED NR 3 ENG UPPER LEFT FIRE DETECTOR ASSY. REPLACED LEFT UPPER RESPONDER AND POSITION LOOP ASSY. PERFORM OPS CHECK PER AMM 26-11-02. ALL INDICATIONS NORMAL. CHECKED GOOD.