As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6429 - IAD-JFK - RETURNED TO GATE DUE TO RIGHT DUCT O-TEMP LIGHT ILLUMINATED. AIRCRAFT WENT TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND FREED ACM, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)