As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE WAS REPORTED IN THE CABIN AFTER TAKEOFF FROM IAH. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND OIL RESIDUE FROM R/H ACM IN DUCTWORK. THE R/H ACM WAS REMOVED AND REPLACED. HOT CYCLES WERE RUN ON R/H PACK FOR 20 MINUTES IAW MM 21-51-11 AND ALL CHECKED GOOD. BOTH COALESCER BAGS WERE REMOVED AND REPLACED.