As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GRU - CREW REPORTED LEFT ENGINE COMPRESSOR STALLED. EMERGENCY DECLARED FLIGHT RETURNED GRU LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND METAL IN TAILPIPE. REPLACED LEFT ENGINE AT GRU ON 06/04/2012. SYSTEM GROUND CHECK NORMAL OPERATION.