The jetways at the widebody gates in concourse C are too short. They will not stretch all the way to the entry door of the 777-300ER. The gates in question are: C10W, C16W, C18W, & C20W. I have not tested the gates at T5 or the other widebody gates (B17, K19X, K15, K13X, or K9)
Regards,
Rob