Which regulation provides information regarding instrument range markings for an airplane certificated in the normal category?

Which regulation provides information regarding instrument range markings for an airplane certificated in the normal category?

• A. 14 CFR Part 91
• B. 14 CFR Part 25
• C. 14 CFR Part 23
• D. 14 CFR Part 27

Answer: (C)

Instrument range markings on flight instruments are defined by the certification standards for small airplanes in the normal category. That’s found in 14 CFR Part 23, which sets the airworthiness requirements for normal-category airplanes and specifies what markings must appear on instruments, including the airspeed indicator. You’ll see the familiar colored ranges: the green arc for normal operating speeds, the white arc for flap operating range, the yellow arc for caution, and the red line for the never-exceed speed. The other parts cover different aircraft categories (Part 25 for transport, Part 27 for rotorcraft) or general operating rules (Part 91), but they don’t govern the instrument range markings for normal-category airplanes.

Instrument range markings on flight instruments are defined by the certification standards for small airplanes in the normal category. That’s found in 14 CFR Part 23, which sets the airworthiness requirements for normal-category airplanes and specifies what markings must appear on instruments, including the airspeed indicator. You’ll see the familiar colored ranges: the green arc for normal operating speeds, the white arc for flap operating range, the yellow arc for caution, and the red line for the never-exceed speed. The other parts cover different aircraft categories (Part 25 for transport, Part 27 for rotorcraft) or general operating rules (Part 91), but they don’t govern the instrument range markings for normal-category airplanes.