Whats up with the FAA saying that it was a CL 60? And it was a 20 pax aircraft! It surley couldnt be a reporter mistake .
ATC's identifier for the Challenger is "CL-60". It doesn't matter if it is a 600, 601, 604, 605.
The airplane is approved for 22 pax. I have not seen one with this configuration, but this is the approved maximum.
-Beer