As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AGENT 1 DISCHARGE LIGHT ILLUMINATED ON ENGINE 2 FIRE PANEL FOR ABOUT THE LAST HOUR OR OUR FLIGHT. LIGHT WENT OUT AT ENGINE SHUTDOWN. REPLACED ENGINE/APU FIRE PANEL PER AMM 26-12-12 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.