---
kind: "section"
citation: "14 C.F.R. § 27.610"
title: "14"
number: "27.610"
heading: "Lightning and static electricity protection."
url: "https://uscodex.org/cfr/14/27.610"
---

# §27.610. Lightning and static electricity protection.

- (a) The rotorcraft 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) Electrically bonding the components properly to the airframe; or
  - (2) Designing the components so that a strike will not endanger the rotorcraft.
- (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 rotorcraft.
- (d) **The electrical bonding and protection against lightning and static electricity must—**
  - (1) Minimize the accumulation of electrostatic charge;
  - (2) Minimize the risk of electric shock to crew, passengers, and service and maintenance personnel using normal precautions;
  - (3) Provide an electrical return path, under both normal and fault conditions, on rotorcraft having grounded electrical systems; and
  - (4) Reduce to an acceptable level the effects of static electricity on the functioning of essential electrical and electronic equipment.

## Notes

### Amendments

[Amdt. 27-21, 49 FR 44433, Nov. 6, 1984, as amended by Amdt. 27-37, 64 FR 45094, Aug. 18, 1999; Amdt. 27-46, 76 FR 33135, June 8, 2011]

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44704.

### Source

Source: Docket No. 5074, 29 FR 15695, Nov. 24, 1964, unless otherwise noted.

### Amendments

[Amdt. 27-21, 49 FR 44433, Nov. 6, 1984, as amended by Amdt. 27-37, 64 FR 45094, Aug. 18, 1999; Amdt. 27-46, 76 FR 33135, June 8, 2011]