Thanks Wizofoz, thanks Old Fellam, Just wake up about the joke...sorry but I have the head in my books and try to prepare my next interviews...if I can get one...
I discussed the letdown with a friend also who said that the "let down" was used in the old ATPL, and we don't find it anymore in the JAR one.
He remembered something about the obstacle clearance of 2000ft and 1000ft for one of them...but he didn't remember exactly...
Thanks guys for your help, so I suppose the difference is the term used in the JAR ATPL or old one.
cu