As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE TO DCA CREW REPORTED A RIGHT BLEED ANTI ICE DUCT WARNING MESSAGE. CREW DECLARED EMERGENCY. CREW LANDED IN DCA WITH NO ISSUES AND FIELD EMERGENCY EQUIPMENT DID NOT RESPOND. MX REMOVED AND REPLACED RH BLEED AIR SUPPLY DUCT IAW CRJ 700 AMM. OPS CHECK GOOD FAULT CLEARED