Static pressure systems.

CFR · 2024-01-01 · US · Title 14

(a) Each instrument with static air case connections must be vented to the outside atmosphere through an appropriate piping system. (b) Each static port must be designed and located so that: (1) The static pressure system performance is least affected by airflow variation, or by moisture or other foreign matter; and (2) The correlation between air pressure in the static pressure system and true ambient atmospheric static pressure is not changed when the airplane is exposed to the icing conditions defined in Appendix C of this part, and the following icing conditions specified in Appendix O of this part: (i) For airplanes certificated in accordance with § 25.1420(a)(1), the icing conditions that the airplane is certified to safely exit following detection. (ii) For airplanes certificated in accordance with § 25.1420(a)(2), the icing conditions that the airplane is certified to safely operate in and the icing conditions that the airplane is certified to safely exit following detection. (iii) For airplanes certificated in accordance with § 25.1420(a)(3) and for airplanes not subject to § 25.1420, all icing conditions. (c) The design and installation of the static pressure system must be such that— (1) Positive drainage of moisture is provided; chafing of the tubing and excessive distortion or restriction at bends in the tubing is avoided; and the materials used are durable, suitable for the purpose intended, and protected against corrosion; and (2) It is airtight except for the

official document · source cfr-2024 · id 14:§ 25.1325