This is another interesting story if anyone is following the issues previously discussed on this blog regarding aviation safety. There are evidently claims that fumes from engine oil or hydraulic fluids can enter cabin air. This could sicken the pilot or first officer, cabin crew, and also passengers, there are signs of both acute toxicity and long lasting neurological sequelae capable of leading to death. https://nypost.com/2025/09/14/us-news/pilots-crew-breathing-fumes-suffer-brain-nerve-damage-report/ Besides the New York Post article from September there is also a cover story on the Wall Street Journal, today December 22nd which goes into additional details, but is behind an internet paywall.