As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN CABIN. MECHANICS FOUND LOOSE B-NUT AT LINE FROM THE AIR/ OIL SEPERATOR TO WET TORQUE INDICATING VENT (FWD FITTING), TIGHTENED FITTING, CLEANED ENGINE, PERFOMED LEAK CHECK @ FULL POWER AND CRUISE SETTINGS FOR 15 MIN. . NO LEAKS. ENGINE RUN PERFORMED IAW MM 77-11-05.