TM 55-1670-251-20&P/TO 13D3-2-2
Nonreparable. No repair is authorized.
(3) Recoverability Code. Recoverability codes are assigned to support items to indicate the
disposition action on unserviceable items. The recoverability code is entered in the fifth position of the
Uniform SMR Code format as follows:
Nonreparable item. When unserviceable, condemn and dispose at
the level indicated in position 3.
b. National Stock Number. Indicates the National stock number assigned to the item and will be
used for requisitioning purposes.
c. Description. Indicates the Federal item name and, if required, a minimum description to
identify the item. The description column includes the following:
(1) Reference Number and Manufacturer Code. Indicates the primary number used by the
manufacturer (individual, company, firm, corporation, or Government activity), which controls the
design and characteristics of the item by means of its engineering drawings, specification standards and
inspection requirements, to identify an item or range of items. The primary number is followed by the
Federal supply code for manufacture (FSCM) in parentheses. The FSCM is a 5-digit numeric code
listed in SB 708-42 which is used to identify the manufacturer, distributor, or Government agency, etc.
NOTE: When a stock numbered item is requisitioned, the repair part received may have a different
reference number than the part being replaced.
(2) Usable on Code. (Not applicable).
d. 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 alpha-
betical 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.
e. Quantity Incorporated in Unit. Indicates the quantity of the item in the breakout shown on
the illustration figure, which is prepared for an assembly. A "V" appearing in this column in lieu of a
quantity indicates that no specific quantity is applicable.
f. Illustration. This column is divided as follows:
(1) Figure Number. Indicates the figure number of the illustration in which the item is
(2) Item Number. The number used to identify each item called out in the illustration.
C-4. How To Locate Repair Parts.
a. When National Stock Number or Reference Number is Unknown:
(1) First. Identify the repair part on the exploded view illustration and note the item
number of the repair part.
(2) Second. Using the Repair Parts Listing, find the item number listed in the illustration
b. When National Stock Number or Reference Number is Known:
(1) First. Using the Index of National Stock Numbers and Reference Numbers find the
pertinent National stock number or reference number. This index is in ascending NSN sequence followed
by a list of reference numbers in ascending alphameric sequence, cross-referenced to the illustration
figure and item number.
(2) Second. After finding the figure and item number, locate the figure and item in the
illustration column of the Repair Parts Listing.