As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU - CREW REPORTED RIGHT WING BODY OVERHEAT INDICATION WITH LEFT WING BODY ON PLACARD. EMERGENCY DECLARED FLIGHT RETURNED SJU LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED COMPARTMENT OVERHEAT DETECTOR CONTROL UNIT. SYSTEM GROUND CHECK NORMAL OPERATION.