CS
22.1545 Air-speed indicator
ED Decision 2003/13/RM
Each air-speed indicator must show the following markings:
(a) For VNE, a radial red line. If VNE varies with altitude, there must be a means to indicate to the pilot the appropriate limitations throughout the operating altitude range. (See AMC 22.1545(a))
(b) for the upper caution range a yellow arc extending from VNE to the allowable rough-air speed VRA;
(c) for the normal operating range, a green arc with the lower limit at 1.1 VS1 with maximum weight and for wing-flaps neutral (see AMC 22.335) and landing gear retracted and the upper limit at the rough-air speed VRA;
(d) for the wing-flap operating range, a white arc with the lower limit at the stall speed 1.1 VS0 for maximum weight and the upper limit at the allowable wing-flaps extended speed VFE;
(e) a yellow marking (triangle) for the lowest approach speed (at maximum weight without water ballast) recommended by the manufacturer;
(f) for the best rate-of-climb speed VY a blue radial line (for powered sailplanes only). service.
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