As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATL/PHL - FLT 561 - AFTER TAKEOFF, THE RIGHT ENGINE A-LOOP ILLUMINATED FOLLOWED LATER BY THE ENGINE FIRE WARNING. AFTER PULLING THE THROTTLE BACK, THE ENGINE FIRE WARNING QUIT AND BOTH FIRE LOOP LIGHTS WENT OUT. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE RIGHT ENGINE AFT SADDLE DUCT. (X)