As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLT 512 - AIR RETURN. EMERGENCY DECLARED, LANDING UNEVENTFUL. THE NR 2 ENGINE OVERHEAT LIGHT ILLUMINATED ON TAKEOFF. ENGINE POWERED BACK LIGHT WENT OUT. FOUND FUEL HEAT AIR LINE CRACKED. REMOVED AND VENDOR REPAIRED LINE. LINE CURRENTLY BEING RE-INSTALLED. (X)