What was found
OIL SMELL AND HAZE IN CABIN. OPERATED PACKS WITH APU, NO ODOR. CHECKED APU FOR LEAKS AND ODORS, CHECKED INTERIOR LIGHTS, RELAMPED INOP LIGHTS TO ENSURE NO BALLAST WERE BAD. CHECKED HISTORY, NONE FOUND. OPERATED PACKS FOR 3 HOURS, NO SMELLS.