As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DEPARTURE THE CREW NOTICED SMOKE IN THE CABIN. NOTIFIED TOWER AND RETURNED TO ICT. STANDARDAERO BORESCOPED THE ENGINE AND FOUND THE #5 CARBON SEAL LEAKING. REMOVED ENGINE FOR REPAIR AND INSTALLED A RENTAL ENGINE. TEST FLIGHT WAS SUCCESSFUL WITH NO SMOKE.