14 C.F.R. § 29.1123 Exhaust piping.
Title 14 - Aeronautics and Space
(a) Exhaust piping must be heat and corrosion resistant, and must have provisions to prevent failure due to expansion by operating temperatures. (b) Exhaust piping must be supported to withstand any vibration and inertia loads to which it would be subjected in operation. (c) Exhaust piping connected to components between which relative motion could exist must have provisions for flexibility.
Title 14: Aeronautics and Space
PART 29—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT
Subpart E—Powerplant
Exhaust System
§ 29.1123 Exhaust piping.
