---
kind: "section"
citation: "14 C.F.R. § 25.519"
title: "14"
number: "25.519"
heading: "Jacking and tie-down provisions."
url: "https://uscodex.org/cfr/14/25.519"
---

# §25.519. Jacking and tie-down provisions.

- (a) **General.** The airplane must be designed to withstand the limit load conditions resulting from the static ground load conditions of [paragraph (b)](#b) of this section and, if applicable, [paragraph (c)](#c) of this section at the most critical combinations of airplane weight and center of gravity. The maximum allowable load at each jack pad must be specified.
- (b) **Jacking.** The airplane must have provisions for jacking and must withstand the following limit loads when the airplane is supported on jacks—
  - (1) For jacking by the landing gear at the maximum ramp weight of the airplane, the airplane structure must be designed for a vertical load of 1.33 times the vertical static reaction at each jacking point acting singly and in combination with a horizontal load of 0.33 times the vertical static reaction applied in any direction.
  - (2) **For jacking by other airplane structure at maximum approved jacking weight—**
    - (i) The airplane structure must be designed for a vertical load of 1.33 times the vertical reaction at each jacking point acting singly and in combination with a horizontal load of 0.33 times the vertical static reaction applied in any direction.
    - (ii) The jacking pads and local structure must be designed for a vertical load of 2.0 times the vertical static reaction at each jacking point, acting singly and in combination with a horizontal load of 0.33 times the vertical static reaction applied in any direction.
- (c) **Tie-down.** If tie-down points are provided, the main tie-down points and local structure must withstand the limit loads resulting from a 65-knot horizontal wind from any direction.

## Notes

### Amendments

[Doc. No. 26129, 59 FR 22102, Apr. 28, 1994]

### 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. 26129, 59 FR 22102, Apr. 28, 1994]