UNIT, DIRECT SUPPORT AND GENERAL SUPPORT
MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST
Section I. INTRODUCTION
SCOPE. This RPSTL lists and authorizes spares and repair parts; special tools; special test, measurement, and
diagnostic equipment (TMDE); and other special support equipment required for performance of unit, direct support and
general support maintenance of the MK12 System. It authorizes the requisitioning, issue, and disposition of spares,
repair parts and special tools as indicated by the source, maintenance and recoverability (SMR) codes.
SMR codes in this RPSTL are shown only on parts that will be stocked for maintenance
of the end item. Other items may be ordered using the CAGEC and Part Number.
Maintenance and recoverability authorization for parts without SMR codes can be
identified by the next higher assembly or the Maintenance Allocation Chart (MAC) found
in TM 5-4220-225-14.
GENERAL. In addition to this section, Introduction, this Repair Parts and Special Tools List is divided into the
Section II. Repair Parts List. A list of spares and repair parts authorized by this RPSTL for use in the
performance of maintenance. This list also includes parts which must be removed for replacement of the authorized
parts. Parts lists are composed of functional groups in ascending alphanumeric sequence, with the parts in each group
listed in ascending figure and item number sequence. Bulk materials are listed in item name sequence. Items are
shown in the associated illustration(s)/figure(s).
Section III. Special Tools List. A list of special tools, special TMDE, and other special support equipment
authorized by this RPSTL (as indicated by Basis of Issue (BOI) information in DESCRIPTION AND USABLE ON CODE
column) for the performance of maintenance.
Section IV. Cross-Reference Index. A list, in National Item Identification Number (NIIN) sequence, of all
National stock numbered items appearing in the listing, followed by a list in alphanumeric 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. The figure and item number index lists figure and item numbers in alphanumeric sequence
and cross references NSN, CAGEC and part number.
EXPLANATION OF COLUMNS (SECTIONS II AND III).
ITEM NO. (Column (1)). Indicates the number used to identify items called out in the illustration.
SMR Code (Column (2)). The Source, Maintenance, and Recoverability (SMR) code is a 5-position code
containing supply/requisitioning information, maintenance category authorization criteria, and disposition instruction, as
shown in the following breakout:
* Complete Repair: Maintenance capacity, capability, and authority to perform all corrective maintenance
tasks of the "Repair" function in a use/user environment in order to restore serviceability to a failed item.