As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: SEVERAL TIMES DURING FLIGHT ENGINE ONE FIRE AGENT ONE DISCHARGER LIGHT WOULD COME ON FOR SEVERAL MINUTES, FLICKER AND GO OUT. MAINTENANCE REPLACED THE #1 ENGINE FORWARD FIRE EXTINGUISHER BOTTLE PER AMM 26-21-41 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.