As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE 1 AGENT 1 DISCHARGE LIGHT CAME ON EN ROUTE PHX-ANC. ENGINE PARMETERS WERE NORMAL. DISCHARGE LIGHT WENT OFF AGAIN DURING DESCENT AND REMAINED OFF. ENGINE 1 FIRE LOOP B ALSO FAULTING INTERMITTENTLY. INSPECTED NR 1 ENGINE FOR ANY SIGN OF FIRE OR OVERHEAT WITH NONE NOTED. PERFORMED ENGINE 1 FIRE CIRCUIT TEST - SYSTEM OPS CHECKED NORMAL. REMOVED AND REPLACED ENGINE/APU FIRE PANEL.