As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT, NR 4 FIRE HANDLE AND FE'S FIRE WARN LIGHT AND BELL ILLUMINATED INTERMITTENTLY. LATER ON DESCENT ENG NR 4 SHORT CIRCUIT LIGHT ILLUMINATTED INTERMITTENTLY. INSTALLED COMPLETE SET OF FIRE DET ELEMENT ASSY'S ON NR 4 ENG FIRE WARN BELL/LIGHT AND SHORT CIRCUIT CHECKS NORMAL.