(1) First. Using the table of contents, determine
e. Federal Supply Code for Manufacturer (FSCM).
the functional group within which the item belongs.
The FSCM is a 5-digit numeric code listed in SB 708-42
This is necessary since illustrations are prepared for
which is used to identify the manufacturer, distributor,
functional groups and listings are divided into the
or Government agency, etc.
f. Description. Indicates the Federal item name and,
(2) Second. Find the illustration covering the func
if required, a minimum description to identify the item.
tional group to which the item belongs..
g. Unit of Measure (U/M). Indicates the standard of
the basic quantity of the listed item as used in perform-
(3) Third. Identify the item on the illustration and
ing the actual maintenance function. This measure is
note the illustration figure and item number of the
expressed by a two-character alphabetical abbrevia-
tion (e.g., ea, in, pr, etc). When the unit of measure
(4) Fourth. Using the Repair Parts Listing, find
differs from the unit of issue, the lowest unit of issue
the figure and item number noted on the illustration.
that will satisfy the required units of measure will be
b. When National stock number or part number is
h. Quantity Incorporated in Unit. Indicates the
(1) First. Using the Index of National Stock Num-
quantity of the item used in the breakout shown on the
bers and Part Numbers, find the pertinent National
illustration figure, which is prepared for a functional
stock number or part number. This index is in NIIN se-
group, subfunctional group, or an assembly.
quence followed by a list of part numbers in
alphameric sequence, cross-referenced to the illustra-
4. Special Information
tion figure number and item number.
The following publication pertains to the AN/GRA-50
(2) Second. After finding the figure and item num-
and its components TM 11-5820-467-15, Antenna Group
ber, locate the figure and item number in the repair
5. How to Locate Repair Parts
a. When National stock number or part number is
(Next printed page is 4)