What was found
BWI - FLT 2679 - ON CLIMB-OUT PASSING 13,000 FEET, THE NR 1 ENGINE OVERHEAT LIGHT ILLUMINATED. CREW ACCOMPLISHED CHECK LIST AND WHEN THRUST LEVER WAS PULLED BACK ON NR 1 ENGINE, LIGHT EXTINGUISHED. CREW DECIDED TO RETURN TO FIELD AT BWI. FLIGHT LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND THE NR 1 ENGINE NOSE COWL ANTI-ICE DUCT HAD BLOWN. REPLACED DUCT. RAN ENGINE. OPS CHECK AND LEAK CHECK GOOD. NO FAULTS NOTED. (X)