As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDU - FLT 1287 - AFTER TAKEOFF RDU AN ODOR, LIKE BURNING RUBBER, ENTERED THE CABIN AND COCKPIT. RETURNED RDU AND LANDED WITHOUT INCIDENT. REPLACED BOTH COALESCER BAGS DUE TO OILY FILTHY CONDITION. ACCOMPLISHED REQUIRED PACK BURNOUT PROCEDURE PER MM. SYSTEM GROUND CHECKED NORMAL OPERATION. NO SMEL OR ODOR AFTER CHECK. (M)