As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PFN/ATL - DURING CLIMB, CREW HEARD A LOUD BANG FROM THE NR 4 ENGINE AND THE AIRCRAFT YAWED. THE CREW SHUT DOWN THE ENGINE, DECLARED AN EMERGENCY AND RETURNED TO PFN WHERE LANDING WAS MADE SAFELY. THIS MRR REMAINS OPEN PENDING TEAR DOWN INFORMATION.