Hi everyone, I am trying to find some info on if a pilot from another airline were to ride on my company's aircraft in a jumpseat behind the crew seats. (We fly cargo Beech 1900's under Part 135) Does this classify the flight as a passenger flight and thus subject to passenger flight rules? Or since the jumpseater is a qualified pilot do they become an additional crew member? Only thing I can find on this is 135.113 but that only references a passenger seat configuration and occupying a pilot seat. Neither of those would apply to us. Thanks for the help!