The stenciled letters shall be lusterless
black for gray backgrounds and lusterless orange
for black backgrounds.
Apply or remove pressure sensitive labels
in accordance with instructions in TM
for serial number 50-7, use 0-00007.
RADIO CALL NUMBERS.
(4) All radio call panels installed with air-
craft, including helicopters, will be revised to
(1) Radio call numbers for Army aircraft
reflect the five radio call numbers applied on the
aircraft, and the six numerals if aircraft are over 10
will consist of five numerals, Radio call numbers
will be derived from the aircraft serial number.
Vertical block-type Arabic numerals will be used
when applying radio call numbers.
(5) Radio call numbers will be applied on
both sides and on each outboard side, as ap-
plicable, of vertical stabilizer and rudder
(2) First numeral of the contract year and
assembly, except that on helicopters they will be
the hyphen in the aircraft serial number will not be
applied to sides of fuselage or vertical fin.
used in radio call numbers. If five numerals. are
not available in the aircraft serial number, zeros
(6) Radio call numbers on tactical air-
will be used to produce the required five numerals.
craft will be 6 inches high. If space is not available
Should more than five numerals be available, the
for this standard size, the size will be of largest
last five numerals of the aircraft serial number will
size which can be applied and compatible with
be used. Example: For serial number 59-5434, use
existing space. For non-tactical aircraft only, the
95434: for serial numbers 59-653472, use 53472: for
suggested minimum size for space occupied by
serial number 59-7, use 90007: for serial number
one call number or designator is 12 inches high by
60-7, use 00007.
8 inches wide. If space is not available for this
standard size, the size will be of largest size which
(3) Since numbers once assigned may
can be applied and compatible with existing
reach an age of 10 years or more, there is a possi-
space. Alternate numerical size will be estab-
bility that two sets of radio call numbers could be
lished by the width equaling two-thirds the height,
identical. To prevent this. the symbol (0) will pre-
and the stroke and space will equal one-sixth the
cede derived numbers of more than 10 years of
height. Vertical block-type numbers will be used
for radio call numbers.