As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE EN ROUTE TO ATL FROM MTY THE CREW WAS WARNED FROM A R BLEED DUCT FAULT MESSAGE. THE QRH WAS THEN STARTED TO CORRECT THE SITUATION. WHILE COMPLYING WITH THE QRH BOTH A/C PACKS AUTOMATICALLY SHUT DOWN. THE CREW DIVERTED TO IAH WHERE MAINTENANCE FOUND A LOOSE DUCT CLAMP WHICH CAUSED THE DUCT FAULT. MAINTENANCE TIGHTENED THE CLAMP AND RESET BOTH PACKS IAW CRJ 900 AMM 21-51-00.