As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD NOISE AFTER T/O FROM AFT PORTION OF A/C POSSIBLE COMP STALL OR CARGO SHIFT NO IRREGULAR ENGINE PARAMETERS NOTICED. RETURNED TO BASE AFTER CONSULTING OCC DUMPED FUEL FROM 520-480 LANDING AT APPROX 474000 FLAPS 50. REPLACED NR 2 ENGINE PER TRANS 8T201AD ON R/C 1 THROUGH 33.