"Thomas Borchert" wrote in message
Actually, no, it doesn't. The word "for" is to be avoided because it sound
the same as "four". It sounds like many airline pilots (just like "twelve
hundred" or "with you"), but professional it is not.

Let's split hairs- I am aware of the Flying Tigers' accident. However,
'four' followed by 'twelve' is hard to confuse. 'four one two thousand'
doesn't make sense either. Professionals are admonished to be concise and
efficient in their transmissions. In that sense, and because Maniac did say
that he was already issued the crossing restriction, "Leaving FL290" would
be better.

D.