1. 8304. Large airplanes and turbine-powered multiengine airplanes operated under Federal Aviation Regulation Part 91, General Operating and Flight Rules, must be inspected A. in accordance with an inspection program authorized under Federal Aviation Regulation Part 91, Subpart E. B. in accordance with a continuous airworthiness maintenance program (camp program) authorized under Federal Aviation Regulation Part 91, Subpart E. C. in accordance with the progressive inspection requirements of Federal Aviation Regulation Section 91.409(d).