As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE, HOLDING AT 14K RECEIVED ANTI-ICE DUCT WARNING IN ICING CONDITIONS WITH WING AND COWL ANTI-ICE ON. RT WING SHOWED RED ON SYNOPTIC PAGE. FOLLOWED QRH AND RETURNED TO IAD AND DECLARED AN EMERGENCY. (ACFT RETURNED TO DEPARTURE AFTER T/O -- EMERGENCY DECLARED -- EQUIPMENT STANDING BY) R & R ALL 21 BLEED LEAK THERMAL SWITCHES IN RT WING IAW AMM 36-21-07. OPS CHECK GOOD. NO FURTHER DEFECTS NOTED. CURE TIME TRANSFERRED TO AFDL 598883-2.