14 CFR § 25.1301 - Function and installation.

Each item of installed equipment must—

(a) Be of a kind and design appropriate to its intended function;

(b) Be labeled as to its identification, function, or operating limitations, or any applicable combination of these factors; and

(c) Be installed according to limitations specified for that equipment.

[Doc. No. FAA-2022-1544, 89 FR 68735, Aug. 27, 2024]