As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST AFTER TAKEOFF SMOKE WAS REPORTED IN CABIN. FLIGHT RETURNED TO STL. FOUND THE NUMBER 2 AND 3 BEARING CARBON SEAL ASSEMBLY ON BOTH ENGINES HAD FAILED. THE AIRCRAFT WAS FERRIED TO ANOTHER STATION FOR REPLACEMENT OF THE CARBON SEAL ASSEMBLIES ON BOTH ENGINES. SERIAL NUMBER ON THE SECOND ENGINE WAS 4949, HOURS AND CYCLES THE SAME AS FIRST ENGINE.