Here is some of the early evidence from 1955 with overwhelming evidence ever since - but only for those scientists who can read.
https://www.aerotoxic.org/pdfs/redda...of-engine1.pdf
Easyjet wisely changed their engine oil in 2017 to Nyco, a safer formulation and deciding to fit 'bleed air' filters & poison detectors in 2018 is the absolute evidence, but only due to criminal proceedings in a Paris criminal Court.
Get informed and read about the 'Precautionary principle' and don't get hysterical over a past legal win in a public High Court. Turner v's East West airlines. (2010).
East West Airlines Ltd v Turner [2010] Australian High Court Judgement
