As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND SMOKE IN CABIN DURING FLIGHT. SMOKE DISSIPATED BEFORE LANDING. MAINTENANCE FOUND LEAKING OIL COOLER HOSE ON THE LT ENGINE, A SMALL AMOUNT OF OIL MIGRATED INTO THE ENVIRONMENTAL SYSTEM THAT CAUSED THE CABIN SMOKE. THE OIL LINES WERE REPLACED AND IT TOOK A FEW ENGINE RUNS TO BURN THE RESIDUAL OIL FROM THE ENVIRONMENTAL SYSTEM.