TM 11 -520-05-24P
Nonreparable item. When unserviceable, condemnand dispose at the level indicated in position 3.
Reparable item. When beyond lower level repaircapability, return to depot. Condemnationand disposal not
authorized below depot level.
Reparable item. Repair, condemnation, and dis posal not authorized below depot/specializedrepair activity level.
National Stock Number. Indicates the National stock number assigned to the item and will be used for
d. Part Number. Indicates the primary number used by the manufacturer (individual, company, firm, corporation,
or Government activity), which controls the design and characteristics of the item by means of its engineering drawings,
specifications, standards, and inspection requirements to identify an item or range of items.
When a stock numbered item is requisitioned, the repair part received may have
a different part number than the part beingreplaced.
Federal Supply Code for Manufacturer (FSCM). The FSCM is a 5-digit numeric code listed in SB 708-42
which is used to identify the manufacturer, distributor, or Government agency, etc.
Description. Indicates the Federal item name and, if required, a minimum description to identify the item.
g. Unit of Measure (U/M). Indicates the standard of the basic quantity of the listed item as used in performing the
actual maintenance function. This 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 be requisitioned.
Quantity Incorporated in Unit. Indicates the quantity of the item used in the breakout shown on the illustration
figure, which is prepared for a functional group, subfunctional group, or an assembly.
Usable on codes are shown in the description column. Uncoded items are applicable to all models.
Identification of the usable on codes used in this publication are:
The following publication pertains to the AN/GRR-23 and AN/GRR-24 and their components: TM 11-5820-
805-14, Receivers, Radio AN/GRR-23 and AN/GRR-24
How to Locate Repair Parts
a. When National stock number or part number is unknown.
(1) First. Using the table of contents, determine the functional group within which the item belongs. This is
necessary since illustrations are prepared for functional groups and listings are divided into the same groups.
(2) Second. Find the illustration covering the functional group to which the item belongs.
(3) Third. Identify the item on the illustration and note the illustration figure and item number of the item.
(4) Fourth. Using the Repair Parts Listing, find the figure and item number noted on the illustration.
When National stock number or part number is known.
(1) First. Using the Index of National Stock Numbers and Part Numbers, find the pertinent National stock
number or part number. This index is in NIIN sequence followed by a list of part numbers in alphameric sequence, cross-
referenced to the illustration figure number and item number.
(2) Second. After finding the figure and item number, locate the figure and item number in the repair parts