What was found
CREW REPORTED COCKPIT AIR SMELLS THICK - HAS AN ODOR AND THERE IS A GREASY FILM BEING FELT ON ALL, RESULTING IN COUGHS AND HEADACHES. MAINTENANCE RAN PACKS 1 & 2 WITH APU BLEED, ENGINE 1 BLEED THEN ENGINE 2 BLEED. SMELL COULD NOT BE DUPLICATED, A/C GOOD FOR SERVICE PER EMB AMM.