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Title 14: Aeronautics and Space
CHAPTER I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
SUBCHAPTER C: AIRCRAFT
PART 25: AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart F: Equipment
: Lights
25.1397 - 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?0.320y ;
x is not greater than y?0.170; and
y is not less than 0.390?0.170x.
(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
0?0.010, whichever is the smaller; and
y is not greater than x+0.020 nor 0.636?0.400x;
Where y
0 is the y coordinate of the Planckian radiator for the value of x considered.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-27, 36 FR 12972, July 10, 1971]
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