Special Information - TM-11-5815-338-40P0006

TM 11-5815-338-40P

523A/GGC and its components:

poration, or Government activity), which controls the

TM 11-5815-338-15, Device, Low Level Signaling

design and characteristics of the item by means of its

TT-523/GGC and TT-523A/GGC

engineering drawings, specifications, standards, and

inspection requirements to identify an item or range

5. How to Locate Repair Parts

of items.

a. When National stock number or part number is

NOTE

unknown.

When a stock numbered item is requisi-

(1) First. Using the table of contents, determine

tioned, the repair part received may have a

the functional group within which the item belongs.

different part number than the part being re-

This is necessary since illustrations are prepared for

placed.

functional groups and listings are divided into the

e. Federal Supply Code for Manufacturer (FSCM).

same groups.

The FSCM is a 5-digit numeric code listed in SB

(2) Second. Find the illustration covering the

708-42 which is used to identify the manufacturer,

functional group to which the item belongs.

distributor, or Government agency, etc.

(3) Third. Identify the item on the illustration and

f. Description. Indicates the Federal item name and,

note the illustration figure and item number of the

if required, a minimum description to identify the

item.

(4) Fourth. Using the Repair Parts Listing, find

g. Unit of Measure (U/M). Indicates the standard of

the figure and item number noted on the illustration.

the basic quantity of the listed item as used in per-

b. When National stock number or part number is

forming the actual maintenance function. This meas-

known.

ure is expressed by a two-character alphabetical abbre-

(1) First. Using the Index of National Stock Num-

viation (e.g., ea, in, pr, etc). When the unit of measure

bers and Part Numbers, find the pertinent National

differs from the unit of issue, the lowest unit of issue

stock number or part number. This index is in NIIN se-

that will satisfy the required units of measure will be

quence followed by a list of part numbers in alpha-

requisitioned.

meric sequence, cross-referenced to the illustration

h. Quantity Incorporated in Unit. Indicates the

figure number and item number.

(2) Second. After finding the figure and item

quantity of the item used in the breakout shown on the

illustration figure, which is prepared for a functional

number, locate the figure and item number in the re-

group, subfunctional group, or an assembly.

pair parts list.

4. Special Information

6. Abbreviations

The following publication pertains to the TT-

Not applicable.

(Next printed page is 4.)

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