---
kind: "section"
citation: "14 C.F.R. § 25.29"
title: "14"
number: "25.29"
heading: "Empty weight and corresponding center of gravity."
url: "https://uscodex.org/cfr/14/25.29"
---

# §25.29. Empty weight and corresponding center of gravity.

- (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](/cfr/14/25.959.md); 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.

## Notes

### Amendments

[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]

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note).

### Source

Source: Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.

### Amendments

[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]