14 C.F.R. § 33.72 Hydraulic actuating systems.
Title 14 - Aeronautics and Space
Each hydraulic actuating system must function properly under all conditions in which the engine is expected to operate. Each filter or screen must be accessible for servicing and each tank must meet the design criteria of §33.71. [Amdt. 33–6, 39 FR 35467, Oct. 1, 1974]
Title 14: Aeronautics and Space
PART 33—AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES
Subpart E—Design and Construction; Turbine Aircraft Engines
§ 33.72 Hydraulic actuating systems.