This manual lists spares and repair parts; special tools;
b. Source, Maintenance, and Recoverability (SMR)
special test, measurement, and diagnostic equipment
(TMDE), and other special support equipment required
(1) Source code. Source codes indicate the man-
for performance of organizational, direct support, and
ner of acquiring support items for maintenance, repair,
or overhaul of end items. Source codes are entered in
general support maintenance of the ME-227/U. It
authorizes the requisitioning and issue of spares and re-
the first and second positions of the Uniform SMR
pair parts as indicated by the source and maintenance
Code format as follows:
2 . General
PA--Item procured and stocked for anticipated or
This Repair Parts and Special Tools List is divided into
XD--A support item that is not stocked. when required,
the following sections:
item will be procured through normal supply
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
Cannibalization or salvage may be used as a
be removed for replacement of the authorized parts.
source of supply for any items source coded
Parts lists are composed of functional groups in numeric
above except those coded XA and aircraft sup-
sequence, with the parts in each group listed in figure
port items as restricted by AR 700-42.
and item number sequence.
(2) Maintenance code. Maintenance codes are
b. Section III. Special Tools List. Not applicable.
assigned to indicate the levels of maintenance authorized
c. Section IV. National Stock Number and Part
to USE and REPAIR support items. The maintenance
Number Index. A list, in National item identification
codes are entered in the third and fourth positions of
number (NIIN) sequence, of all National stock numbers
the Uniform SMR Code format as follows:
(NSN) appearing in the listings, followed by a list, in
(a) The maintenance code entered in the third
alphameric sequence, of all part numbers appearing in
position will indicate the lowest maintenance level
the listings. National stock numbers and part numbers
authorized to remove, replace, and use the support item.
are cross-referenced to each illustration figure and item
indicate one of the following levels of maintenance:
3. Explanation of Columns
O--Support item is removed, replaced, used at the or-
a. Illustration. This column is divided as follows:
(1) Figure number. Indicates the figure number
H--Support item is removed, replaced, used at the
of the illustration on which the item is shown.
general support level.
(2) Item number. The number used to identify
item called out in the illustration.