Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 1Date: 2023-01-01Original Date: 2023-01-01Title: Section 27.1397 - Color specifications.Context: Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION. SUBCHAPTER C - AIRCRAFT. PART 27 - AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT. Subpart F - Equipment. - Lights.
§ 27.1397 Color specifications. Each position light color must have the applicable International Commission on Illumination chromaticity coordinates as follows: (a) Aviation red y is not greater than 0.335; and z is not greater than 0.002. (b) Aviation green x is not greater than 0.440−0.320 y ; x is not greater than y −0.170; and y is not less than 0.390−0.170 x. (c) Aviation white x is not less than 0.300 and not greater than 0.540; y is not less than x −0.040” or y c −0.010, whichever is the smaller; and y is not greater than x + 0.020 nor 0.636−0.400 x ; Where y c is the y coordinate of the Planckian radiator for the value of x considered. [Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as amended by Amdt. 27–6, 36 FR 12972, July 10, 1971]