TM 55-1680-320-23 & P
b. Assembly References. When details of an assembly are shown on another text page, the description of that
assembly is followed by a notation stating where these details can be located. Example: 161954-100, Fuel Control (See
Fig. 6 for Breakdown). The parts that make up the Fuel Control will be found on the next text listing for Figure 6.
C-6. 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 repaired 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 illstration and note the item number,
(4) Fourth. Using the Repair Parts List, find the item number noted on the illustration,
(5) Fifth. Refer to the Part Number Index to determine National Stock
Number (if assigned).
b. When National Stock Number or Part Number is Known:
(1) Fret. Using the Index of National Stock Numbers and Part Numbers, find the pertinent National stock number
or part number. This index is in FSC sequence followed by a list of part number in alphanumeric 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 list.
Basis of Issue
National Stock Number
Repair Parts and Special Tools List