14 C.F.R. § 25.29 Empty weight and corresponding center of gravity.
Title 14 - Aeronautics and Space
(a) The empty weight and corresponding center of gravity must be determined by weighing the airplane with— (1) Fixed ballast; (2) Unusable fuel determined under §25.959; and (3) Full operating fluids, including— (i) Oil; (ii) Hydraulic fluid; and (iii) Other fluids required for normal operation of airplane systems, except potable water, lavatory precharge water, and fluids intended for injection in the engine. (b) The condition of the airplane at the time of determining empty weight must be one that is well defined and can be easily repeated. [Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25–42, 43 FR 2320, Jan. 16, 1978; Amdt. 25–72, 55 FR 29774, July 20, 1990]
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart B—Flight
General
§ 25.29 Empty weight and corresponding center of gravity.
