Originally Posted by Chris Weston
I appreciate that a reduction of TCPs et al contamination to zero is indeed impracticable for all the reasons given.
If TCPs weren't found in the oils used, then of course it would be reduced to zero !!
What the majority of sane, thinking people seem to want, is some logical course of action being taken to completely remove TCPs and reduce other OPs should cabin-air contamination occur, as well as steps to reduce aerosol contamination generally.
e.g. working up design considerations, trials and guidelines for at least a first-line of defence filtration system.... are the CAA for instance, seriously not looking at the basic necessities for removing this headache from their Inbox? Are they political automatons or human beings working there now - they certainly used to take safety issues seriously, whosoever or however they were brought to their attention, ...
To do
nothing, to instigate no corrective actions, is surely tantamount to reckless endangerment now that this problem has been recognised as being more serious than hitherto thought (of course it was always known there was a degree of contamination, by simple reasoning, now we have other factors, many more a/c and pax at risk, and synthetic oils, as well as some engines and apu's that have become 'notorious' in this respect).
Dare I say it...
there's no smoke without fire!