<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by
[email protected]:
"... and 9000-9999 are primarily used for ferry flights, off schedule ops, extra sections and so on."
I did not know that airlines used sections for flights (railroads used sections many times. Once the 20th CENTURY LIMITED ran in 7 sections!)
Examples and situations for AA or other airlines?</font>
As my post stated, all my examples were AA-specific!
Airlines use 'extra sections' if a route has an additional flight, if for example, the previous days' flight was cancelled.