(1)
The axis of the maximum cone of illumination is parallel to the .ight path in level .ight; and

(2)
There is no obstruction aft of the light and between planes 70'to the right

and left of the axis of maximum illumination. Amdt. 23-43, E.. 05/10/93
FAR23.1391 :Minimumintensitiesinthehorizontalplane of[positionlights.]
Each position light intensity must equal or exceed the applicable values in the follo-wing table :
Dihedral angle (light included)  Angle from right or left of longitudinal axis, measu-red from dead ahead ''  Intensity (candles) 
[Land R (red and green).]  0to 1010'to 20' 20'to 110' ''  40 30 5 
A (rear white)  110to 180 20 

′
Elodie Roux. Septembre 2003
Subpart F : Equipment
Amdt. 23-43, E. 05/10/93
FAR23.1393:Minimumintensitiesinany verticalplane[ofpositionlights.]
Each position light intensity must equal or exceed the applicable values in the follo-wing table :
Angle above or below the horizontal plane '  Intensity 
00'to 5' 5'to 10' 10'to 15' 15'to 20' 20'to 30' 30'to 40' 40'to 90'  1.00 I. 0.90 I. 0.80 I. 0.70 I. 0.50 I. 0.30 I. 0.10 I. 0.05 I. 

Amdt. 23-43, E.. 05/10/93
FAR23.1395 :Maximumintensitiesin overlapping beams of[positionlights.]
No position light intensity may exceed the applicable values in the following table, except as provided in Sec. 23.1389(b)(3) :
Overlaps  Maximum intensity 
Area A (candles)  Area B (candles) 
Green in dihedral angle L  10  1 
Red in dihedral angle R  10  1 
Green in dihedral angle A  5  1 
Red in dihedral angle A  5  1 
Rear white in dihedral angle L  5  1 
Rear white in dihedral angle R  5  1 

where–
(a)
Area A includes all directions in the adjacent dihedral angle that pass through the light source and intersect the common boundary plane at more than 10'but less than 20'; and

(b)
Area B includes all directions in the adjacent dihedral angle that pass through the

light source and intersect the common boundary plane at more than 20'. Amdt. 23-43, E.. 05/10/93
FAR 23.1397 : Color speci.cations.
Eachpositionlight colormusthavethe applicableInternationalCommission onIllu-mination 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 notgreaterthan0.440-0.320y;

”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” isnotlessthan ”x-0.040” or ”y0-0.010”,whicheveristhesmaller; and ”y” isnotgreaterthan ”x+0.020” nor ”0.636-0.400 x”;
Where ”y0” is the ”y” coordinate of the Planckian radiator for the value of ”x” considered.] Amdt. 23-11, E.. 08/11/71
FAR 23.1399 : Riding light.
(a)
Each riding(anchor) light requiredfor a seaplane or amphibian, mustbeinstalled so that it can–

(1)
Show a white light for at least two miles at night under clear atmospheric conditions; and

(2)
Show the maximum unbroken light practicable when the airplane is moored or drifting on the water.

(b)
Externally hung lights may be used.

FAR 23.1401 : Anticollision light system.

(a)
[General. The airplane must have an anticollision light system that–]

(1)
Consists of one or more approved anticollisionlightslocated so that their light will notimpairthe .ight crewmembers’ visionordetractfromtheconspicuity ofthepositionlights; and
　
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本文鏈接地址：FAA規(guī)章 美國(guó)聯(lián)邦航空規(guī)章 Federal Aviation Regulations 2(93)