max altitude deviation before bust?

That's exactly what I'm talking about. My understanding was that if you
have been cleared to maintain 3000 feet, and you dip down for example
past 2800' then it's a violation. A friend heard that it's actually 100
feet, which would incur a violation passing 2900 feet going by my
previous example.

Is there some reliable source of information where this info can be found?

On 2004-03-20 22:16:00 -0500, "Steven P. McNicoll"
said:


Depends what you mean by "violated". If your Mode C altitude is within 200
feet of your reported altitude you're considered to be on altitude.