As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 7910 - BNA - CREW REPORTED A SMOKE LIKE SMELL IN THE COCKPIT. THIS AIRCRAFT WAS ON A FUNCTIONAL CHECK FLIGHT FOR A DUEL PROP REMOVAL. HANGAR MECHANICS FOUND OIL IN THE 'A' SUMP OF THE RT ENGINE. FURTHER TROUBLESHOOTING FOUND RT ENGINE TO BE DEFECTIVE.