the illustration figure, which is prepared for a functional
group, subfunctional group, or an assembly.
4. Special Information
Z - Nonreparable item. When unserviceable, condemn
The following publications pertain to the AN/ GRA-4 and
and dispose at the level indicated in position 3.
its components: TM 11-2651, Antenna Groups AN/GRA-
0 - Reparable item. When uneconomically reparable,
4 and AN/GRA-12 TM 11-5985-22912P, Mast AB-
condemn and dispose at organizational level.
86/GRA-4 TM 11-598522365P, Mast AB-86/GRA-4 5.
F - Reparable item. When uneconomically reparable,
How to Locate Repair Parts a. When National stock
condemn and dispose at the direct support level.
number or part number is unknown.
c. National Stock Number. Indicates the National
Using the table of contents,
stock number assigned to the item and will be used for
determine the functional group within which the item
This is necessary since illustrations are
d. Part Number.
Indicates the primary number
prepared for functional groups and listings are divided
used by the manufacturer (individual, company, firm,
into the same groups.
corporation, or Government activity), which controls the
(2) Second. Find the illustration covering the
design and characteristics of the item by means of its
functional group to which the item belongs.
engineering drawings, specifications, standards, and
(3) Third Identify the item on the illustration
inspection requirements to identify an item or range of
and note the illustration figure and item number of the
(4) Four. Using the Repair Parts Listing, find
the figure and item number noted on the illustration.
When a stock numbered item is
b. When National stock number or part number is
requisitioned the repair part received
may have a different part number
than the part being replaced.
(1) First. Using the Index of National Stock
Numbers and Part Numbers, find the pertinent National
e. Federal Supply Code for Manufacturer (FSCM).
stock number or part number. This index is in NIIN
The FSCM is a 5-digit numeric code listed in SB 708-42
sequence followed by a list of part numbers in
which is used to identify the manufacturer, distributor, or
alphanumeric sequence, cross-referenced to the
Government agency, etc.
illustration figure number and item number.
f. Description. Indicates the Federal item name
(2) Second. After finding the figure and item
and, if required, a minimum description to identify the
number, locate the figure and item number in the repair
g. Unit of Measure (UIM). Indicates the standard
of the basic quantity of the listed item as used in
performing the actual maintenance function.
measure is expressed by a two-character alphabetical
abbreviation (e.g., ea, in, pr, etc).
When the unit of
measure differs from the unit of issue, the lowest unit of
issue that will satisfy the required units of measure will
h. Quantity Incorporated in Unit.
quantity of the item used in the breakout shown on
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