As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG FUEL ODOR OBSERVED IN CABIN DURING DESCENT AND LANDING. GROUND CABIN OBSERVED WHITE/BLUE SMOKE COMING FROM LEFT ENGINE AS AIRCRAFT APPROACHED THE GATE WITH BOTH ENGINES RUNNING. SMOKE DECREASED IN INTENSITY AFTER ENGINE WAS SHUT DOWN, BUT WHITE SMOKE CONTINUED TO COME FROM THE REAR OF THE LEFT ENGINE FOR 10 MINUTES AFTER SHUTDOWN. THIS IS CURRENTLY A WORK IN PROGRESS