Hydraulic systems.

CFR · 2024-01-01 · US · Title 14

(a) (1) Withstand the proof pressure without permanent deformation that would prevent it from performing its intended functions, and the ultimate pressure without rupture. The proof and ultimate pressures are defined in terms of the design operating pressure (DOP) as follows: (2) Withstand, without deformation that would prevent it from performing its intended function, the design operating pressure in combination with limit structural loads that may be imposed; (3) Withstand, without rupture, the design operating pressure multiplied by a factor of 1.5 in combination with ultimate structural load that can reasonably occur simultaneously; (4) Withstand the fatigue effects of all cyclic pressures, including transients, and associated externally induced loads, taking into account the consequences of element failure; and (5) Perform as intended under all environmental conditions for which the airplane is certificated. (b) (1) Have means located at a flightcrew station to indicate appropriate system parameters, if (i) It performs a function necessary for continued safe flight and landing; or (ii) In the event of hydraulic system malfunction, corrective action by the crew to ensure continued safe flight and landing is necessary; (2) Have means to ensure that system pressures, including transient pressures and pressures from fluid volumetric changes in elements that are likely to remain closed long enough for such changes to occur, are within the design capabilities of each element,

official document · source cfr-2024 · id 14:§ 25.1435