As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED E-1 AND E-2 FIREXBTL A FAIL MSG IN FLIGHT, EMERGENCY WAS DECLARED BY ATC AND EMERGENCY VEHICLES WERE DISPATCHED. THE A/C LANDED WITHOUT INCIDENT AT DCA. MAINTENANCE REMOVED AND REPLACED E-1 & E-2 FIRE BOTTLE A PER EMB AMM, OPS CHECK GOOD.