As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT OR ABOUT 50 NM NORTH OF IAD CLIMBING THROUGH 14,000 FT, CREW NOTICED LT BLEED AIR LEAK CAUTION LIGHT. CREW COMPLIED WITH QRH AND CONTACTED DISPATCH. IT WAS DECIDED TO RETURN TO IAD. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MX FOUND BAD SEAL BY Y DUCT. REPLACED SEAL OPS CHECKED GOOD.