I thought this thread was locked. I think the captains death was officially logged as coincidental. However, if you get in touch with our environmental committee, the chairman is the FO on the flight. He can give you endless amounts of information. The cause is usually a seal in the motors that allows oil fumes into the packs system. The APU is the most common offender. Spirit has since put much better and as we are told, much more expensive pack filters in all the aircraft. They denied this was even happening at first. They announced this month that we are also changing oil this month to an oil that has a lower level or doesn't contain the neurotoxin. Again the environmental committee will be more than happy to share all info.

It's not just an airbus issue either.

If you smell wet dog or gym socks get your O2 on immediately. I've smelled it before and it's very noticeable. We were at the gate with the apu running so we just got up and walked off