C 3, TM 9-6650-221-35
differs from the unit of issue, the lowest unit of issue that
B-5. How to Locate Repair Parts
will satisfy the required units of measure will be
a. When Federal stock number or reference
requisitioned.
number is unknown:
e. Quantity Incorporated in Unit. This column lists
(1) First.
Using the table of contents,
the quantity of the item used in the breakout shown in the
determine the functional or subfunctional group within
illustration figure, which is prepared for a functional
which the repair part belongs; i.e., head assembly, body
group, subfunctional group, or an assembly. A V
assembly, mount assembly; etc. This is necessary since
appearing in this column in lieu of a quantity indicates
illustrations are prepared for functional and subfunctional
that no specific quantity is applicable; e.g., shims,
groups, and listings are divided into the same groups.
spacers; etc.
(2) Second. Find the illustration covering the
f. 30-Day DS/GS Maintenance Allowances.
functional or subfunctional group to which the repair part
(1) The repair parts, indicated by asterisk (*)
belongs.
entries in separate allowance column(s), for DS and GS
(3) Third. Identify the repair part on the
represents those parts authorized for use at that
illustration and note the illustration figure and item
category of maintenance and will be requisitioned on an
number of the repair part.
as required basis.
(4) Fourth. Using the repair parts listing, find
(2) Allowance quantities are indicated in the
the functional or subfunctional group to which the repair
special tools list section for special tools, TMDE, and
part belongs and locate the illustration figure and item
other support equipment.
number noted on the illustration.
g. Depot Maintenance Allowances Per 100
b. When Federal stock number or reference
Equipments.
This column indicates that the item
number is known:
identified with an asterisk (*) are authorized to be
(1) First. Using the index of Federal stock
requisitioned as required.
numbers and reference numbers find the pertinent
h. Illustration. This column is divided as
Federal stock number or reference number. This index
follows:
is in ascending FSN sequence followed by a list of
(1) Figure Number. This column indicates
reference numbers in ascending alphanumeric
the figure number of the illustration on which the item is
sequence, cross-referenced to the illustration figure
shown.
number and item number.
(2) Item Number. This column indicates the
(2) Second. Using the repair parts listing, find
callout number used to reference the item on the
the functional or subfunctional group of the repair part
illustration.
and the illustration figure number and item number
referenced in the index of Federal stock numbers and
B-4. Special Information
reference numbers.
a. Action change codes indicated in the left-hand
margin of the listing page denote the following:
6. Abbreviations
N-Indicates an added item.
C-Indicates a change in data.
Abbreviations
Explanation
R-Indicates a change in FSN only.
amp ..................................... amperage
blt ........................................ bolt
b. To maintain disassembly sequence in this
cres ..................................... corrosion-resistant steel
manual, a number in parentheses will be displayed
dp ........................................ depth
immediately to the right of the callout number on the
ea ........................................ each
illustration.
fl ......................................... flat
gl ......................................... glass
B-3
