When the part to be used differs between serial numbers of the same model, the effective serial numbers are shown as
the last line of the description. In the Special Tools List, the initial basis of issue (BOI) appears as the last line in the
entry for each Special Tool, TMDE, and support equipment. When density of equipments supported exceeds density
spread indicated in the basis of issue, the total authorization is increased accordingly.
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.
h. Quantity Furnished With Equipment (Basic Issue Items Only). Indicates the quantity of the basic issue item
furnished with the equipment.
i. Quantity Authorized (Items Troop) Installed or Authorized Only). Indicates the quantity of the item authorized to
be used with the equipment will be requisitioned.
j. 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. A "V" appearing in this column in
lieu of a quantity indicates that no specific quantity is applicable (e.g., shims, spacers, etc.).
C-4. Special Information
C-5. How to Locate Repair Parts
a. When Federal Stock Number or Part Number is Unknown:
(1) First. Using the table of contents, determine the assembly group within which the repair part belongs.
This is necessary since illustrations are prepared for assembly groups and listings are divided into the same groups.
(2) Second. Find the illustration covering the assembly group to which the repair part belongs.
(3) Third. Identify the repair part on the illustration and note the illustration figure and item number of the
(4) Fourth. Using the Repair Parts Listing, find the figure and item number noted on the illustration.
b. When Federal Stock Number or Part Number Is Known:
(1) First. Using the Index of Federal Stock Numbers and Part Numbers, find the pertinent Federal stock
number or part number. This index is in ascending alpha-numeric 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