(a) Compliance with the requirements of Sec. Sec. 23.65, 23.66, 23.67, 23.69, and 23.77 must be shown--
(1) Out of ground effect; and
(2) At speeds that are not less than those at which compliance with the powerplant cooling requirements of Sec. Sec. 23.1041 to 23.1047 has been demonstrated; and
(3) Unless otherwise specified, with one engine inoperative, at a bank angle not exceeding 5 degrees.
(b) For normal, utility, and acrobatic category reciprocating engine-powered airplanes of 6,000 pounds or less maximum weight, compliance must be shown with Sec. 23.65(a), Sec. 23.67(a), where appropriate, and Sec. 23.77(a) at maximum takeoff or landing weight, as appropriate, in a standard atmosphere.
(c) For reciprocating engine-powered airplanes of more than 6,000 pounds maximum weight, single-engine turbines, and multiengine turbine airplanes of 6,000 pounds or less maximum weight in the normal, utility, and acrobatic category, compliance must be shown at weights as a function of airport altitude and ambient temperature, within the operational limits established for takeoff and landing, respectively, with--
(1) Sections 23.65(b) and 23.67(b) (1) and (2), where appropriate, for takeoff, and
(2) Section 23.67(b)(2), where appropriate, and Sec. 23.77(b), for landing.
(d) For multiengine turbine airplanes over 6,000 pounds maximum weight in the normal, utility, and acrobatic category and commuter category airplanes, compliance must be shown at weights as a function of airport altitude and ambient temperature within the operational limits established for takeoff and landing, respectively, with--
(1) Sections 23.67(c)(1), 23.67(c)(2), and 23.67(c)(3) for takeoff; and
(2) Sections 23.67(c)(3), 23.67(c)(4), and 23.77(c) for landing. [Doc. No. 27807, 61 FR 5186, Feb. 9, 1996, as amended by Amdt. 23-62, 76 FR 75753, Dec. 2, 2011]