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Aerotoxic syndrome is a phrase coined by Chris Winder and Jean-Christophe Balouet in 2000, to describe their claims of short- and long-term ill-health effects caused by breathing airliner cabin air which was alleged to have been contaminated to toxic levels (exceeding known, parts per million, safe levels) with atomized engine oils or other chemicals. Repeated investigations of such claims have failed to document cabin air has ever contained contaminants which exceeded known safe levels. An assessment by the UK's House of Lords Science and Technology Committee found that claims of health effects were unsubstantiated. An update in 2008 found no significant new evidence. this syndrome is not recognized in medicine. ==Potential sources of contamination== Modern jetliners have an environmental control system (ECS) that manages the flow of cabin air. Outside air enters the engines and is compressed in the forward section, prior to the combustion section, ensuring no combustion products can enter the cabin. A portion of that compressed bleed air is used to pressurize the cabin. The ECS then recirculates some of that cabin air through HEPA filters, while the rest is directed to outflow valves, ensuring there is a constant supply of fresh, clean air coming into the cabin pressurization system at all times. In rare instances, it is possible for contaminants to enter the cabin through that air-supply system. Substances used in the maintenance and treatment of aircraft, including aviation engine oil, hydraulic fluid, cleaning compounds and de-icing fluids, can contaminate the ECS. While ground and flight crews, as well as passengers themselves can be sources of contaminants such as pesticides, "...bioeffluents, viruses, bacteria, allergens, and fungal spores,"〔〔 they have not been implicated as contaminants related to the alleged aerotoxic syndrome.〔 According to an information leaflet from the UK-based Committee on Toxicology (COT) possible sources of poor-quality cabin air include:〔http://cot.food.gov.uk/sites/default/files/cot/cotpospapcabin.pdf〕 * Engine or auxiliary power unit (APU) oil leaks * Engine or APU bay leaks * Underfloor hydraulic leaks. * Ingestion of deicing fluid into APU inlet. * Periodic maintenance task that is required to clean the forward galley oven. * Inappropriate or excessive use of dry ice by caterers. * Toilet fluid spillage, leakage and also unapproved mixing of different disinfectant fluids within the toilet. * Leakage of the rain repellent system, or rain repellent contamination within the cabin or flightdeck. * Spillage within baggage bays. * Items stowed in overhead baggage bins. Jet engines require synthetic oils for lubrication. These oils contain ingredients such as tricresyl phosphate (TCP or TOCP), an organophosphate, which can be toxic to humans in quantities much larger than are found in aviation engine oil. 〔 Engine bearing seals are installed to ensure that critical engine bearings are continuously lubricated, and to prevent engine oil from leaking into the compressed air stream. If a bearing seal fails and begins to leak, depending on the location of the seal, some amount of engine oil may be released into the compressed air stream. Oil leaks may be detected by an odour akin to hot frying-pan fume, or, in more serious cases, by smoke in the cabin.〔 This is known in the industry as a fume event. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Aerotoxic syndrome」の詳細全文を読む スポンサード リンク
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