---
kind: "section"
citation: "14 C.F.R. § 25.581"
title: "14"
number: "25.581"
heading: "Lightning protection."
url: "https://uscodex.org/cfr/14/25.581"
---

# §25.581. Lightning protection.

- (a) The airplane must be protected against catastrophic effects from lightning.
- (b) For metallic components, compliance with [paragraph (a)](#a) of this section may be shown by—
  - (1) Bonding the components properly to the airframe; or
  - (2) Designing the components so that a strike will not endanger the airplane.
- (c) For nonmetallic components, compliance with [paragraph (a)](#a) of this section may be shown by—
  - (1) Designing the components to minimize the effect of a strike; or
  - (2) Incorporating acceptable means of diverting the resulting electrical current so as not to endanger the airplane.

## Notes

### Amendments

[Amdt. 25-23, 35 FR 5674, Apr. 8, 1970]

### 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

[Amdt. 25-23, 35 FR 5674, Apr. 8, 1970]