EXPLANATION OF COLUMNS (SECTIONS II AND III).

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ORGANIZATIONAL MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST

TM-55-1905-220-20P-2 Landing Craft Utility LCU 1671 Through 1679 NSN 1905-01-009-1056 Manual

Maintenance Code

TM 55-1905-220-20P-2

(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 NSN 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

MF -

(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.