aircraft components and nicotine/tar
 

Can anyone provide me with any on-line sources of the effects of cigarette smoke on aircraft components.
Not so much now, but when smoking was the norm in passenger aircraft I well remember problems caused with nicotine/ tar etc. For instance nicotine restricting the pressure bungs where cable runs exit the pressurised cabin. Some instruments being clogged up, outflow valves.
I need to provide an on-line cite to prove to someone that these things can happen.
Thanks.

In days pass when most of the passenders smoked we used to take the outflow valves out of all the a/c to clean them with industrial au de cologue it was like tar, and very hard to wash off.
Used to clean the instrument glasses as a film from smoke made the readings dark.

Used to be a lot easier to trace a pressurisation leak though!!

Just look for the brown streak somewhere on the fuselage. :}