TM 11-6140-203-20P-3
SECTION I
INTRODUCTION
1. Scope
This manual lists spares and repair parts; special tools; special test, measurement, and diagnostic equipment
(TMDE), and other special support equipment required for performance of organizational maintenance of the B-
422/U, BB-651/ UIH6(V), BB-429/U, BB-501/U, BB-693/U, BB-672/U, and BB-651/U. It authorizes the
requisitioning and issue of spares and repair parts as indicated by the source and maintenance codes.
2. General
This Repair Parts and Special Tools Lists is divided into the following sections:
a. Section II. Repair Parts List. A list of spares and repair parts authorized for use in the performance of
maintenance. The list also includes parts which must be removed for replacement of the authorized parts. Parts
lists are composed of functional groups in numeric sequence, with the parts in each group listed in figure and
item number sequence.
b. Section III. Special Tools List. Not applicable.
c. Section IV. National Stock Number and Part Number Index. A list, in National item iden-stock numbers
(NSN) appearing in the listings, followed by a list, in alphameric sequence, of all part numbers appearing in the
listings. National stock numbers and part numbers are cross-referenced to each illustration figure and item
number appearance.
3. Explanation of Columns
a. Illustration. This column is divided as follows:
(1) Figure number. Indicates the figure number of the illustration on which the item is
shown.
(2) Item number. The number used to identify item called out in the illustration.
b. Source, Maintenance, and Recoverability (SMR) Codes.
(1) Source code. Source codes indicate the manner of acquiring support items for maintenance, repair,
or overhaul of end items. Source codes are entered in the first and second positions of the Uniform
SMR Code format as follows:
Code
Definition
PA -
Item procured and stocked for anticipated or known usage.
NOTE
Cannibalization or salvage may be used as a source of supply for any items
source coded above except those coded XA and aircraft support items as
restricted by AR 700-42.
(2) Maintenance code. Maintenance codes are assigned to indicate the levels of maintenance
authorized to USE and REPAIR support items. The maintenance codes are entered in the third
and fourth positions of the Uniform SMR Code format as follows:
(a) The maintenance code entered in the third position will indicate the lowest maintenance level
authorized to remove, replace, and use the support item. The maintenance code entered in
the third position will indicate one of the following levels of maintenance:
Code
Application/Explanation
O-
Support item is removed, replaced, used at the organizational level.
(b) The maintenance code entered in the fourth position indicates whether the item is to be
repaired and identifies the lowest maintenance level with the capability to perform complete
repair (i.e., all authorized maintenance functions). This position will contain one of the
following maintenance codes:
Code
Application/Explanation
Z-
Nonrepairable. 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:
Recoverability
codes
Definition
Z-
Nonrepairable item. When unserviceable, condemn and
dispose at the level indicated in position 3.
c. National Stock Number. Indicates the National stock number assigned to the item and will be used for
requisitioning purposes.
d. Part Number. 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, specifications, standards, and inspection requirements to identify an item or range of
items.
NOTE
When a stock numbered item is requisitioned, the repair part received may have
a different part number than the part being replaced.
e. Federal Supply Code for Manufacturer (FSCM). The FSCM is a 5-digit numeric code listed
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