Aerotoxic Syndrome What Is Aerotoxic Syndrome? In 1999, three scientists investigating the ill health many aircrew suffered from came up with the name â€œAerotoxic Syndromeâ€ to describe the different symptoms being experienced after some flights. It was discovered that not only were there toxic chemicals present in modern synthetic jet engine oils, but that those toxins were passing unfiltered into the aircraft cabins, affecting the air that crew and passengers breathe in. UK Pilot Richard Westgate died in December of 2012. He had fallen ill many years before and felt that it was due to toxic fumes entering the cabin.