As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE S/N 93901 WAS INSTALLED ON ACFT S/N BB-1219 AFTER OVERHAUL, DURING THE OPERATIONAL CHECK FLIGHT THE PILOT NOTICED SMOKE IN THE COCKPIT AND ABORTED THE CHECK FLIGHT RETURNING TO THE AIRPORT WITHOUT INCIDENT. AFTER TROUBLESHOOTING AND SPEAKING TO A TECH REP. IT WAS DETERMAINED THAT THERE WAS AN INTERNAL OIL LEAK IN THE NR 1 ENGINE S/N 93901 CAUSING SMOKE IN THE COCKPIT, THE NR 1 ENGINE WAS REPLACED AND AN OPERATIONAL CHECK FLIGHT WAS CONDUCTED WITH OUT INCIDENT.