SECTION I INTRODUCTION - TM-11-5995-202-20P0002

SECTION I

INTRODUCTION

1. Scope

(2) Maintenance code. Maintenance codes

This manual lists repair parts and special tools required

are assigned to indicate the levels of maintenance

for performance of organizational maintenance of the

authorized to USE and REPAIR support items. The

MK-456/GRC and MK-456A/GRC.

maintenance codes are entered in the third and fourth

2. General

position of the Uniform SMR Code format as follows:

This Repair Parts and Special Tools List is divided into

(a) The maintenance code entered in

the following sections:

the third position will indicate the lowest maintenance

a. Section II. Repair Parts List. A list of repair

level authorized to remove, replace, and use the support

parts authorized for use in the performance of

item. The maintenance code entered in the third

maintenance. The list also includes parts which must be

position will indicate one of the following levels of

removed for replacement of the authorized parts. Parts

maintenance:

lists are composed of functional groups in ascending

Code

Application/Explanation

numerical sequence, with the parts in each group listed

O-

Support item is removed, replaced, used at

in figure and item number sequence.

the organizational level.

b. Section III. Special Tools List. Not applicable.

(b) The maintenance code entered in

the fourth position indicates whether the item is to be

c. Section IV. National Stock Number and Part

repaired and identifies the lowest maintenance level

Number Index. A list, in ascending National item

with the capability to perform complete repair (i.e., all

identification number (NIIN, last 9 digits) sequence, of

authorized maintenance functions). This position will

all National stock number appearing in the listings,

contain one of the following maintenance codes:

followed by a list, in alphameric sequence, of all part

Code

Application/Explanation

number appearing in the listings. National stock number

and part numbers are cross referenced to each

H-

The lowest maintenance level capable of

illustration figure and item number appearance.

complete repair of the support item is the

general support level.

3. Explanation of Columns

Z-

Nonreparable. No repair is authorized.

The following provides an explanation of columns found

(3) Recoverability code.

Recoverability

in the tabular listings:

codes are assigned to support items to indicate the

a. Illustration. This column is divided as follows:

disposition action on unserviceable items.

The

(1) Figure number.

Indicates the figure

recoverability code is entered in the fifth position of the

number of the illustration in which the item is shown.

Uniform SMR Code format as follows:

(2) Item number.

The number used to

Recoverability

identify each item called out in the illustration.

Codes

Definition

b. Source, Maintenance, and Recoverability Codes

Z-

Nonreparable item. When unserviceable,

(SMR).

condemn and dispose at the level indicated

(1) Source code. Source codes are assigned

in position 3.

to support items to indicate the manner of acquiring

D-

Reparable item. When beyond lower level

support items for maintenance, repair, or overhaul of

repair capability, return to depot. Con-

end items. Source codes are entered in the first and

demnation and disposal not authorized

second positions of the Uniform SMR Code format as

below depot level.

follows:

c. National Stock Number. Indicates the National

Code

Definition

stock number assigned to the item and will be used for

PA -

Item procured and stocked for anticipated or

requisitioning purposes.

known usage.

d. Part Number. Indicates the primary number

XD -

A support item that is not stocked. When

used by the manufacturer (individual, company, firm,

required, item will be procured through

corporation, or Government activity), which controls the

normal supply channels.

design and characteristics of the item by means of its

NOTE

engineering drawings, specifications standards, and

Cannibalization or salvage may be

inspection requirements, to identify an item or range of

used as a source of supply for any

items.

items source coded above except

NOTE

those coded XA, XD, and aircraft

When a stock numbered item is

support items as restricted by AR

requisitioned,

the

repair

part

700-42.

received may have a different part

number than the part being replaced.