As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GRU - CAPTAIN REPORTED LOUD BANG AND RIGHT ENGINE COMPRESSOR STALL (SINGLE ENGINE TIME 20 MINUTES). THE CREW RECEIVED A FIRE LIGHT ON RIGHT ENGINE AND PULLED A BOTTLE FOR IT. EMERGENCY DECLARED FLIGHT RETURNED GRU LANDED WITHOUT INCIDENT. DURING INSPECTION FOUND SEVERAL SMALL METALLIC DEBRIS MELTED AT ENGINE EXAUST. REPLACED RIGHT ENGINE. SYSTEM GROUND CHECK NORMAL OPERATION.