determine the functional group within which the repair
ported exceeds density spread indicated in the basis of
part belongs. This is necessary since illustrations are
issue, the total authorization is increased accordingly.
prepared for functional groups, and listings are divided
g. Unit of Measure ( U/M ). Indicates the standard of
into the same groups.
the basic quantity of the listed item as used in
(2) Second. Find the illustration covering the
performing the actual maintenance function. This
functional group to which the repair part belongs.
measure is expressed by a two character alphabetical
(3) Third. Identify the repair part on the illustration
abbreviation (e.g., ea. in, pr, etc.). When the unit of
measure differs from the unit of issue, the lowest unit of
and note the illustration figure and item number of the
issue that will satisfy the required units of measure will
(4) Fourth. Using the Repair Parts Listing, find the
h. Quantity Incorporated in Unit. Indicates the
figure and item number noted on the illustration.
quantity of the item used in the breakout shown on the
b. When Federal Stock Number or Part Number is
illustration figure, which is prepared for a functional
group, subfunctional group, or an assembly. A "V"
(1) First. Using the Index of Federal Stock
appearing in this column in lieu of a quantity indicates
Numbers and Part Numbers, find the pertinent Federal
that no specific quantity is applicable, (e.g., shims,
stock number or part number. This index is in ascending
FSN sequence followed by a list of part numbers in
C-4. How to Locate Repair Parts.
ascending alphanumeric sequence, cross-referenced to
a. When Federal Stock Number or Part Number is
the illustration figure number and item number.
(2) Second. After finding the figure and item
(1) First. Using the table of contents,
number, locate the figure and item number in the repair