What was found
AIR COMING INTO THE AIRCRAFT FROM ANY OF THE 3 PACKS IS LADDEN WITH A STRONG SMOKEY ODOR WHICH BURNS THE EYES AND IS UNCOMFORTABLE TO BREATHE. IT IS MORE PRONOUNCED THE WARMER YOU SELECT THE TEMP. SUSPECT A PETROLEUM PRODUCT IS BEING HEATED/BURNED SOME WHERE IN SYSTEM. OPERATED ALL 3 PACKS WITH DOORS CLOSED COULD NOT DUPLICATE ODOR WITH SEVERAL DIFFERENT PACKS SETTINGS WITH NO DEFECTS NOTED. AIRCRAFT SAFE FOR CONTINUED FLIGHT.