As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3909 - AFTER ROTATION, RECEIVED A "SMOKE TOILET" MESSAGE ALONG WITH SMOKE IN THE CABIN. FOUND ENGINE OIL MIGRATING INTO THE BLEED SYSTEM. REPLACED RIGHT ENGINE WITH SERVICEABLE UNIT IAW CRJ 200 MM 71-00-00. ALL OPS CHECK AND LEAK CHECKS GOOD, PN CF34-3B1, SN/OFF 873574.