What was found
WHEN BRINGING THE PACKS ONLINE AFTER INITIAL PREFLIGHT THE AIR OUTPUT SMELLS VERY STRONG OF OIL OR OTHER ENVIRONMENTAL CHEMICALS. RUNNING ALL 3 PACKS REQUESTING HOT TEMPS IN ALL 3 ZONES APPEARED TO HELP THE ODOR TO DISSIPATE. RAN APU AS PER JRH. RAN ALL 3 PACKS AS PER MM 21-53-00-7 -AIR CONDITIONING PACK AND DISTRIBUTION DUCT ODOR CLEANING. ALL CHECKS PASSED WITH NO ODOR. NO HISTORY FOUND FOR 90 DAYS. A/C OK FOR SERVICE.