Originally Posted by Pilotpip
It will not meet the critera for a part 135 cert because it's not certified for fligth into known icing where the 58 is.
No, that's not true. You probably don't see too many 55s on 135 because of the seating arrangement. The 58 has club seating (unless, of course, it is used ofr freight). A 55 can go on a 135 just like any other aircraft especially if it is a VFR only certificate.