As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN COCKPIT ON GROUND AFTER AIR COND PACK TURNED ON. ACFT RELEASED FOR SERVICE PER MEL/CDL: 49-10-01. SMOKE WAS NOTED DURING FIRST PACK OPERATION FOLLOWING COMPRESSOR WASH OF THE NR 2 ENGINE, SUSPECT WATER FROM WASH IN BLEED DUCT. OPERATED APU PER JRH 3-2 WITH NO FAULTS NOTED.