As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT RETURNED DFW ACCOUNT DUAL BLEED AIR FAILURE. EMERGENCY DECLARED. FLIGHT LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. TROUBLESHOT AND FOUND BOTH BMC #1 AND BMC #2 INOPERATIVE. REMOVED AND REPLACED BOTH BMC'S IAW AMM 36-11-34-0401. BOTH BLEED SYSTEMS OPS CHECK GOOD.