That may be the case in reply to both the above but it is 2006 and having had my ride (727) swept out of europe for not being compliant, I find it incredible that such noisy monsters are allowed to continue to operate at such sensitive times of the night.
We are talking about the APU here!!!!!! You should hear it!! I have never encountered anything like it in all my years on the ramp.
Just a blatent blind eye if you ask me to line the pockets of all concerned.
Coop & where's my ear defenders Bear