Dirty Zone
 

What is dirty zone in term of safety and human factor:confused:

Not sure - there are all sorts of terms now in use.
The best description may be an error-provoking condition and that covers a multitude; poor tooling, poor access. poor procedures, stress, fatigue, time pressure.
It was a Canadian who came up with the "Dirty Dozen" (perhaps that is what you allude to?) listing 12 problems facing the AME (Norms, complacency, lack of awareness etc).
Have a look here
The UK CAA has done a lot of work on HF (as have TC and the FAA) and the ICAO has adopted some of the CAA's work as standards .
PM me and discuss further.

Aw damn, here was me hoping for a bit of Eng dirtiness to rival Jet Blast........

I could direct you to the dirty zone......... http://www.goldenrivet.co.uk/phpBB2/...on_twisted.gif