Those dirty socks smells
The thing is everyone knows the 146 has a very unique odour & its just been accepted as normal, but its not Ok anylonger & the manufacturer has to address the leaking oil properly once & for all, no matter what it takes. After all thier own Service bulletin says that the fumes used to be seen as a nuisance & now must be seen as a threat to flight safety!! What about the crews safety, namely their health.
It's time for the regulators to acknowledge they are way out of their depth & start listening to the independent experts & take this seriously. The coverup HAS TO STOP.
Then again I hear its not only the 146, but also the 757, A320, MD80, E145............... Fix the PROBLEM before the passengers make you!