§ 29.1545 - Airspeed indicator.

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Each airspeed indicator must be marked as specified in paragraph (b) of this section, with the marks located at the corresponding indicated airspeeds.

The following markings must be made:

A red radial line—

For rotorcraft other than helicopters, at VNE; and

For helicopters, at a VNE (power-on).

A red, cross-hatched radial line at VNE (power-off) for helicopters, if VNE (power-off) is less than VNE (power-on).

For the caution range, a yellow arc.

For the safe operating range, a green arc.