g. Thirty-Day DS/GS Maintenance Allow-
Indicates the callout
( 2 ) Item number.
ances.
number used to reference the item on the illustra-
tion.
4. Special Information
a. Repair parts mortality has been based on
(1) The allowance columns are divided in-
1500 hours operation per year.
to three subcolumns. Indicated in each sub-
b. Parts which require manufacture or as-
column, opposite the first appearance of each
sembly of a category higher than that authorized
item, is the total quantity of items authorized for
for installation will indicate in the source column
the number of equipments supported. Subsequent
the higher category.
appearances of the same item will have the let-
ters "REF" in the applicable allowance column.
c. The following publication pertains to the
To locate the referenced item, locate the FSN or
welding set and its components:
reference number in the index. The earliest figure
TM 5-3431-227-14 Operator's,
Organiza-
and item number is the referenced item. Items
t i o n a l , DS and GS
authorized for use as required but not for initial
Maintenance Manual
stockage are identified with an asterisk in the
d.
The same illustrations are used to illus-
allowance column.
trate
the repair parts and special tools listed in
(2) The quantitative allowance for DS/GS
both
organizational maintenance section and di-
levels of maintenance will represent initial stock-
rect
and general support maintenance section.
age for a 30-day period for the number of equip-
ments supported.
5. How to Locate Repair Parts
( 3 ) To determine allowances when sup-
a. When the Federal stock number or refer-
porting more than 100 of these equipments:
ence number is unknown:
First, divide the number of equipments sup-
(1) First. Using the table of contents, de-
ported by 100 by moving the decimal two places
termine the assembly group within which the re-
left; second, multiply the result by the quantity
pair part belongs. This is necessary since illus-
in the 51-100 density column. Example, author-
trations are prepared for assembly groups, and
ized allowance for 51-100 equipments is 40; for
listings are divided into the same groups.
150 equipments multiply 40 by 1.50 or 60 parts
required.
(2) Second. Find the illustration covering
the assembly group to which the repair part be-
h. One-Year Allowance Per 100 Equipments/
longs.
Contingency Planning Purposes. This column in-
dicates opposite the first appearance of each
(3) Third. Identify the repair part on the
item the total quantity required for distribution
illustration and note the illustration figure and
and contingency planning purposes. Subsequent
item number of the repair part.
appearance of the same item will have the letters
(4) Fourth. Using the Repair Parts List-
"REF" in this column. The range of items indi-
ing, find the assembly group to which the repair
cates total quantities of all authorized items re-
part belongs and locate the illustration figure
quired to provide for adequate support of 100
and item number noted on the illustration.
equipments for one year.
b. When the Federal stock number or refer-
i. Depot Maintenance Allowance Per 100
ence number is known:
Equipments. This column indicates opposite the
first appearance of each item, the total quantity
( 1 ) First. Using the Index of Federal
authorized for depot maintenance of 100 equip-
Stock Numbers and Reference Numbers find the
ments. Subsequent appearances of the same item
pertinent Federal stock number or reference
will have the letters "REF" in this column. Items
number. This index is in ascending FSN sequence
authorized for use but not for initial stockage are
followed by a list of reference numbers in al-
i d e n t i f i e d with an asterisk in the allowance
pha-numeric sequence, cross-referenced to the
column.
illustration figure number and item number.
j. I l l u s t r a t i o n . This column is divided as
(2) Second. Using the Repair Parts List-
follows :
ing, find the assembly group of the repair part
(1) Figure number. Indicates the figure
and the illustration figure number and item num-
number of the illustration on which the item is
ber referenced in the Index of Federal Stock
shown.
Numbers and Reference Numbers.
iv
