As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD - INFLIGHT MIA-LGA. CREW REPORTED LEFT ENGINE OIL QUANTITY WAS STEADILY DECREASING. FLIGHT DIVERTED IAD LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT ENGINE DUE TO REPEATS OF HIGH OIL CONSUMPTION. SYSTEM GROUND CHECKED NORMAL OPERATION.