As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C, AIR TURNBACK DUE TO SMOKE IN COCKPIT. SMOKE SMELL IS COMING OFF OF THE RIGHT SIDE. RIGHT ENGINE WAS JUST CHANGED. ENG INSPECTION FOR OIL LEAKS C/W. ENG PWR RUN C/W. COCKPIT CK FOR SMOKE OR FUMES C/W. NO SMOKE OR ODORS DETECTED DURING ENG RUN. OK FOR SERVICE.