As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN CABIN AT 22,000 FEET. MAINTENANCE GROUND RAN AIRCRAFT WITH CREW AND COULD NOT DUPLICATE PROBLEM. UPDATE 07/06/2006 GROUND RAN AIRCRAFT TO MAX POWER WITH BLEEDS ON FOR 10 MINS. FOUND OIL LEVEL IN BOTH ENGINES OVERSERVICED, LOWERED TO PROPER LEVEL.