What was found
FLIGHT 3422, CREW REPORTED NR 1 PACK CREATED SMOKE, HAZE AND AN ODOR WHEN TURNED ON. AIRCRAFT REMOVED FROM SERVICE. RAN BOTH ENGINES IAW AMM 71-00-01. DID NOT DETECT SMOKE ODOR AND SAW NO HAZE USING EITHER PACK UNIT. NO PARTS REMOVED OR REPLACED. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.