illustration figure, which is prepared for a functional
group, subfunctional group, or an assembly.
Z-Nonreparable item. When unserviceable, con-
4. Special Information
demn and dispose at the level indicated in posi-
a. Usable on codes shown in the description column.
F-Reparable item. When uneconomically reparable,
Uncoded items are applicable to all models. Identifica-
condemn and dispose at the direct support level.
tion of the usable on codes used in this publication are:
H-Reparable item. When uneconomically reparable,
condemn and dispose at the general support
A-Item requires special handling or condemnation
b. The following publications pertain to the AN/
procedures because of specific reasons (i.e., pre-
GMM-1 and AN/GMM-1A and its components:
cious metal content, high dollar value, critical
TM 11-6660-219-12, Radiosonde Baseline Check Sets
material or hazardous material). Refer to ap-
AN/GMM-1 and AN/GMM-1A
propriate manuals/directives for specific in-
TM 11-6660-219-20P, Radiosonde Baseline Check
Sets AN/GMM-1 and AN/GMM-1A
c. National Stock Number. Indicates the National
TM 11-6660-219-34, Radiosonde Baseline Check Sets
stock number assigned to the item and will be used for
AN/GMM-1 and AN/GMM-1A with Radiosonde
Test Set TS-1348/GMM-1A
d. Part Number. Indicates the primary number
used by the manufacturer (individual, company, firm,
5. How to locate Repair Parts
corporation, or Government activity), which controls
a. When National stock number or part number is
the design and characteristics of the item by means of
its engineering drawings, specifications standards,
(1) First. Using the table of contents, determine
and inspection requirements, to identify an item or
the functional group within which the repair part be-
range of items.
longs. This is necessary since illustrations are pre-
pared for functional groups and listings are divided
into the same groups.
(2) Second. Find the illustration covering the
When a stock numbered item is re-
functional group to which the repair part belongs.
quisitioned, the repair part received may
(3) Third. Identify the repair part on the illustra-
have a different part number than the part
tion and note the illustration figure and item number
of the repair part.
e. Federal Supply Code for Manufacturer (FSCM).
(4) Fourth. Using the Repair Parts Listing, find
the figure and item number noted on the illustration.
The FSCM is a 5-digit numeric code listed in SB
b. When National stock number or part number is
708-42 which is used to identify the manufacturer,
distributor, or Government agency, etc.
(1) First. Using the Index of National Stock
f. Description. Indicates the Federal item name
Numbers and Part Numbers, find the pertinent Na-
and, if required, a minimum description to identify the
tional stock number or part number. This index is in
g. Unit of Measure (U/M). Indicates the standard
ascending NIIN sequence followed by a list of part
numbers in ascending alphameric sequence, cross-
of the basic quantity of the listed item as used in
referenced to the illustration figure number and item
performing the actual maintenance function. This
measure is expressed by a two-character alphabetical
(2) Second. After finding
abbreviation (e.g., ea, in, pr, etc.). When the unit of
number, locate the figure and
measure differs from the unit of issue, the lowest unit
repair parts list.
of issue that will satisfy the required units of measure
will be requisitioned.
h. Quantity Incorporated in Unit. Indicates the
quantity of the item used in the breakout shown on the
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