14 C.F.R. § 23.1527 Maximum operating altitude.
Title 14 - Aeronautics and Space
(a) The maximum altitude up to which operation is allowed, as limited by flight, structural, powerplant, functional or equipment characteristics, must be established. (b) A maximum operating altitude limitation of not more than 25,000 feet must be established for pressurized airplanes unless compliance with §23.775(e) is shown. [Doc. No. 26269, 58 FR 42166, Aug. 6, 1993]
Title 14: Aeronautics and Space
PART 23—AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES
Subpart G—Operating Limitations and Information
§ 23.1527 Maximum operating altitude.
