---
kind: "section"
citation: "14 C.F.R. § 27.1327"
title: "14"
number: "27.1327"
heading: "Magnetic direction indicator."
url: "https://uscodex.org/cfr/14/27.1327"
---

# §27.1327. Magnetic direction indicator.

- (a) **Except as provided in paragraph (b) of this section—**
  - (1) Each magnetic direction indicator must be installed so that its accuracy is not excessively affected by the rotorcraft's vibration or magnetic fields; and
  - (2) The compensated installation may not have a deviation, in level flight, greater than 10 degrees on any heading.
- (b) A magnetic nonstabilized direction indicator may deviate more than 10 degrees due to the operation of electrically powered systems such as electrically heated windshields if either a magnetic stabilized direction indicator, which does not have a deviation in level flight greater than 10 degrees on any heading, or a gyroscopic direction indicator, is installed. Deviations of a magnetic nonstabilized direction indicator of more than 10 degrees must be placarded in accordance with [§ 27.1547(e)](/cfr/14/27.1547.md?p=e).

## Notes

### Amendments

[Amdt. 27-13, 42 FR 36972, July 18, 1977]

### 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. 27-13, 42 FR 36972, July 18, 1977]