As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3233 -ATB/DE- FLIGHT RETURNED TO ATL DUE TO HEARING A LOUD BANG FOLLOWED BY HIGH ENGINE VIBRATIONS FROM #1 ENGINE. ATL MAINTENANCE FOUND METAL IN THE TAILPIPE. CORRECTIVE ACTION: ENGINE CHANGE REQUIRED. R/R #1 ENGINE PER A320 AMDS WORK CARD 7100-9901-LT. (8681554)