As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THE NR 2 ENGINE FIRE PUSHBUTTON SWITCH LIGHT, CONTINUOUS REPETITIVE CHIME, BOTH MASTER WARNINGS AND ENGINE CONTROL PANEL FIRE LIGHT FAIL TO TEST. MAINTENANCE REMOVED AND REPLACED THE NR 2 ENGINE FIRE DETECTION UNIT IN ACCORDANCE WITH AMM 26-12-34 PB401 AND PERFORMED AN OPERATIONAL CHECK.