Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 1Date: 2020-01-01Original Date: 2020-01-01Title: Section § 27.993 - Fuel system lines and fittings.Context: Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION. SUBCHAPTER C - AIRCRAFT. PART 27 - AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT. Subpart E - Powerplant. - Fuel System Components.
§ 27.993 Fuel system lines and fittings. (a) Each fuel line must be installed and supported to prevent excessive vibration and to withstand loads due to fuel pressure and accelerated flight conditions. (b) Each fuel line connected to components of the rotorcraft between which relative motion could exist must have provisions for flexibility.
Code of Federal Regulations / Title 14 - Aeronautics and Space / Vol. 1 / 2020-01-01538
(c) Flexible hose must be approved. (d) Each flexible connection in fuel lines that may be under pressure or subjected to axial loading must use flexible hose assemblies. (e) No flexible hose that might be adversely affected by high temperatures may be used where excessive temperatures will exist during operation or after engine shutdown. [Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as amended by Amdt. 27-2, 33 FR 964, Jan. 26, 1968]