As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK DURING CLIMBOUT, GOT HIGH AVM READING IN EXCESS OF 3.0. BOTH 'A' AND 'B' WITH VIBRATION NOTICED IN FLT CONTROLS. PERFORMED NR 3 ENGINE FAILURE IN FLT SHUTDOWN AT 0705Z. RETURNED TO MIA WITHOUT FURTHER INCIDENT. ENGINE CHANGE IN PROGRESS. CAUSE OF FAILURE TO BE DETERMINED AT SHOP TEARDOWN.