Source Code - TM-55-1905-220-34P-10018

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Section I. INTRODUCTION

TM-55-1905-220-34P-1 Landing Craft Utility LCU 1671 Through 1679 NSN 1905-01-009-1056 Manual

Maintenance Code

TM 55-1905-220-34P-1

(1 ) Source Code. The source code tells you how to get an item needed for maintenance, repair, or

overhaul of an end item/equipment. Explanations of source codes follows:

Source Code

Explanation

Stocked items; use the applicable NON to request/requisition items with these

source codes. They are authorized to the category indicated by the code

PC**

entered in the 3rd position of the SMR code.

**NOTE: Items coded PC are subject to deterioration.

Items with these codes are not to be requested/requisitioned individually. They

are part of a kit which is authorized to the maintenance category indicated in the

3rd position of the SMR code. The complete kit must be requisitioned and

applied.

MO - (Made at Unit/AVUM

Items with these codes are not to be requested/requisitioned

Level)

individually. They must be made from bulk material which

ME - (Made at DS/AVUM

is identified by the part number in the DESCRIPTION and

Level)

USABLE ON CODE (UOC) column and listed in the Bulk

MH - (Made at GS Level)

Material group of the repair parts list in this RPSTL. If the

ML - (Made at Specialized

item is authorized to you by the 3rd position code of the SMR

Repair Activity (SRA))

code, but the source code indicates it is made at a higher

MD - (Made at Depot)

level, order the item from the higher level of maintenance.

AO - (Assembled by Unit/AVUM -

Items with these codes are not to be requested/

Level)

requisitioned individually. The parts that make up

AF - (Assembled by DS/AVIM -

the assembled item must be requisitioned or

Level)

fabricated and assembled at the level of

AH - (Assembled by GS

maintenance indicated by the source code. If the

Category)

3rd position code of the SMR code authorizes you

AL - (Assembled by SRA)

to replace the item, but the source code indicates

AD - (Assembled by Depot)

the items are assembled at a higher level, order the

item from the higher level of maintenance.

XA - Do not requisition "XA"-coded item. Order its next higher assembly. (Refer to the NOTE below.)

XB - If an "XB" item is not available from salvage, order it using the CAGEC and part number given.

XC - Installation drawing, diagram, instruction sheet, field service drawing, that is identified manufacturer's part

number.

XD - Item is not stocked. Order an "XD-coded item through normal supply channels using the CAGEC and

part number given, if no NSN is available.