The King Air is a Single pilot certified a/c, this means that you can fly it single pilot in private ops or when for example just repositioning the a/c.....However, you can fly the plane in an multi pilot operation requireing you to operate with two pilots....An example would be passenger operations (all operations with payload i think)..... This does NOT mean that it's a multi crew a/c!! Then the a/c would have to be certified for two pilots as minimum crew - all operations!! Does it sound clear? Maybe not, but I think I got it right!!!