As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT #3505 CREW REPORTED AT 1,000 FT. THE #4 ENGINE HAD TWO LOUD BANGS AND THE EGT WENT HIGH. INFLIGHT SHUTDOWN. AIR RETURN TO MSP. MAINTENANCE REPLACED #4 ENGINE PN lF507-1F SN/OFF P07877 SN/ON P07854 REF TASK CARD 7100-502 FOR DETAILS.