Originally Posted by
gipple
The danger is in the pyrolized oil. Every entity knows there is a serious health problem with exposure, yet none will take responsibility. These fumes are the equivalent chemically to chemical weapons. The neurological damages are numerous. Air crew are not covered by OSHA oversight. As far as I know, Spirit is the only American airline that has a very specific checklist for fumes. Many times fume events happen after an engine wash because corners are cut. Ask me how I know.
Also often caused by over servicing the engine/APU oil. That was one of B6’s big problems. Too much oil in the system, would find seals to come out of, then pool up, then be ingested on idle descents and spray the old dirty socks smell (later the magic marker smell after we switched oils). IAE2500 engines don’t help since their normal oil pressure is like 3x-4x that of other engines.