As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE AND FUMES ENTERED THE CABIN AFTER TAKEOFF FROM IAH. SOME ALARMS IN THE CABIN ACTIVATED. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE R/H ACM TURBINE OIL SEAL BLOWN. THE R/H ACM AND COALESCER BAG WAS REMOVED AND REPLACED IAW MM 21-51-11 AND 21-51-41. THE LEFT PACK, AIR CONDITIONING DISTRIBUTION AREA, WHEEL WELLS, AND TAIL AREA WERE INSPECTED WITH NO OTHER DISCREPANCIES NOTED.