---
kind: "section"
citation: "14 C.F.R. § 25.171"
title: "14"
number: "25.171"
heading: "General."
url: "https://uscodex.org/cfr/14/25.171"
---

# §25.171. General.


The airplane must be longitudinally, directionally, and laterally stable in accordance with the provisions of [§§ 25.173 through 25.177](/cfr/14/25.173..25.177.md). In addition, suitable stability and control feel (static stability) is required in any condition normally encountered in service, if flight tests show it is necessary for safe operation.


## Notes

### Amendments

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-7, 30 FR 13117, Oct. 15, 1965]

### 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. 25-7, 30 FR 13117, Oct. 15, 1965]