---
kind: "section"
citation: "14 C.F.R. § 29.1545"
title: "14"
number: "29.1545"
heading: "Airspeed indicator."
url: "https://uscodex.org/cfr/14/29.1545"
---

# §29.1545. Airspeed indicator.

- (a) Each airspeed indicator must be marked as specified in [paragraph (b)](#b) of this section, with the marks located at the corresponding indicated airspeeds.
- (b) The following markings must be made:
  - (1) **A red line—**
    - (i) **For rotorcraft other than helicopters, at V<I>NE</I>.**
    - (ii) **For helicopters, at V<I>NE</I> (power-on).**
    - (iii) **For helicopters, at V<I>NE</I> (power-off).** If VNE (power-off) is less than VNE (power-on) and both are simultaneously displayed, the red line at VNE (power-off) must be clearly distinguishable from the red line at VNE (power-on).
  - (2) [Reserved]
  - (3) **For the caution range, a yellow range.**
  - (4) **For the normal operating range, a green or unmarked range.**

## Notes

### Amendments

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29-15, 43 FR 2327, Jan. 16, 1978; 43 FR 3900, Jan. 30, 1978; Amdt. 29-17, 43 FR 50602, Oct. 30, 1978; Amdt. 29-59, 88 FR 8740, Feb. 10, 2023]

### Authority

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

### Source

Source: Docket No. 5084, 29 FR 16150, Dec. 3, 1964, unless otherwise noted.

### Amendments

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29-15, 43 FR 2327, Jan. 16, 1978; 43 FR 3900, Jan. 30, 1978; Amdt. 29-17, 43 FR 50602, Oct. 30, 1978; Amdt. 29-59, 88 FR 8740, Feb. 10, 2023]