As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4156 - DURING CLIMB-OUT FROM EVV-ATL, THE CREW NOTICED A STRONG OIL ODOR IN THE CABIN AND COCKPIT. THE AIRCRAFT LANDED SAFELY IN ATL. MAINTENANCE REMOVED AND REPLACED THE COALESCER BAGS TO THE AIR CYCLE MACHINE. OPS CHECK GOOD. AIRCRAFT OK FOR SERVICE. (M)