As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CUN - INFLIGHT MIA-GUA. CREW REPORTED FUMES IN AFT CABIN GALLEY AREA. EMERGENCY DECLARED DIVERTED CUN LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. BOTH ENGINE OIL LEVELS WERE OVERSERVICED. DRAINED OIL TO NORMAL LEVELS. SYSTEM GROUND CHECK NORMAL OPERATION.