Section 31.63

14 CFR Ch. I (1-1-19 Edition)

Section 31.63 Safety belts.
(a) There must be a safety belt, harness, or other restraining means for
each occupant, unless the Administrator finds it unnecessary. If installed,
the belt, harness, or other restraining
means and its supporting structure
must meet the strength requirements
of subpart C of this part.
(b) This section does not apply to balloons that incorporate a basket or gondola.
[Amdt. 31-2, 30 FR 3377, Mar. 13, 1965, as
amended by Amdt. 31-3, 41 FR 55474, Dec. 20,
1976]

Section 31.65 Position lights.
(a) If position lights are installed,
there must be one steady aviation
white position light and one flashing
aviation red (or flashing aviation
white) position light with an effective
flash frequency of at least 40, but not
more than 100, cycles per minute.
(b) Each light must provide 360Section horizontal coverage at the intensities prescribed in this paragraph. The following light intensities must be determined with the light source operating
at a steady state and with all light covers and color filters in place and at the
manufacturer-s rated minimum voltage. For the flashing aviation red light,
the measured values must be adjusted
to correspond to a red filter temperature of at least 130 SectionF:
(1) The intensities in the horizontal
plane passing through the light unit
must equal or exceed the following values:
Position light

Minimum
intensity
(candles)

Steady white ........................................................
Flashing red or white ...........................................

20
40

(2) The intensities in vertical planes
must equal or exceed the following values. An intensity of one unit corresponds to the applicable horizontal
plane intensity specified in paragraph
(b)(1) of this section.

spaschal on DSK3GDR082PROD with CFR

Angles above and below the horizontal in any
vertical plane (degrees)
0 ...........................................................................
0 to 5 ...................................................................
5 to 10 .................................................................
10 to 15 ...............................................................

Minimum
intensity
(units)
1.00
0.90
0.80
0.70

Angles above and below the horizontal in any
vertical plane (degrees)
15
20
30
40

to
to
to
to

20
30
40
60

...............................................................
...............................................................
...............................................................
...............................................................

12:50 Apr 30, 2019

Jkt 247046

PO 00000

Frm 00706

Fmt 8010

0.50
0.30
0.10
0.05

(c) The steady white light must be located not more than 20 feet below the
basket, trapeze, or other means for carrying occupants. The flashing red or
white light must be located not less
than 7, nor more than 10, feet below the
steady white light.
(d) There must be a means to retract
and store the lights.
(e) Each position light color must
have the applicable International Commission on Illumination chromaticity
coordinates as follows:
(1) Aviation red - 
y is not greater than 0.335; and z is not greater than 0.002.

(2) Aviation white - 
x is not less than 0.300 and not greater than
0.540;
y is not less than xSection0.040 or yoSection0.010, whichever is the smaller; and
y is not greater than x + 0.020 nor
0.636Section0.0400 x;
Where yo is the y coordinate of the Planckian
radiator for the value of x considered.
[Doc. No. 1437, 29 FR 8258, July 1, 1964, as
amended by Amdt. 31-1, 29 FR 14563, Oct. 24,
1964; Amdt. 31-4, 45 FR 60179, Sept. 11, 1980]

Subpart E - Equipment
Section 31.71

Function and installation.

(a) Each item of installed equipment
must - 
(1) Be of a kind and design appropriate to its intended function;
(2) Be permanently and legibly
marked or, if the item is too small to
mark, tagged as to its identification,
function, or operating limitations, or
any applicable combination of those
factors;
(3) Be installed according to limitations specified for that equipment; and
(4) Function properly when installed.
(b) No item of installed equipment,
when performing its function, may affect the function of any other equipment so as to create an unsafe condition.

696

VerDate Sep<11>2014

Minimum
intensity
(units)

Sfmt 8010

Y:\SGML\247046.XXX

247046