What was found
ATL/MDW - FLT 248 - THE CAPTAIN CALLED BACK WITH ENGINE VIBRATION. THE AIRCRAFT RETURNED TO ATL. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE. OPS CHECKED OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ATL/MDW - FLT 248 - THE CAPTAIN CALLED BACK WITH ENGINE VIBRATION. THE AIRCRAFT RETURNED TO ATL. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE. OPS CHECKED OK.