0085 00-2 TM 5-5420-278-24&P 0085 00 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: Code PA PB PC** PD PE PF PG KD KF KB MO-   (Made at Unit Level) MF-    (Made at DS Level) MD-   (Made at Depot) MH-   (Made at General Repair Act (GRA)) ML-    (Made at Specialized Repair Act (GRA)) AO- (Assembled by Unit Level) AF- (Assembled by DS Level) AH- (Assembled by GS Level) AL- (Assembled by SRA) AD- (Assembled by Depot) 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 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. Items with these codes are not to be requested/requisitioned individually. They must be made from bulk material which is identified by the part number in the DESCRIPTION AND USABLE ON CODE (UOC) column and listed in the bulk material group of the repair parts list in the RPSTL. If the item is authorized to you by the 3rd position code of the SMR code, but the source code indicates it is made at a higher level, order the item from the higher level of maintenance. Items with these codes are not to be requested/requisitioned individually. The parts that make up the assembled item must be requisitioned or fabricated and assembled at the level of maintenance indicated by the source code. If the 3rd position code of the SMR code authorized you to replace the item, but the source code indicates the item is assembled at a higher level, order the item from the higher level of maintenance. Source Maintenance Recoverability Code Code Code XX 1st two XX X positions How you get an item 3rd position 4th position Who determines disposition action on an Who can install, replace Who can do complete unserviceable item or use the item repair* on the item *  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. 5th position EXPLANATION OF COLUMNS IN THE REPAIR PARTS LIST AND SPECIAL TOOLS LIST WORK PACKAGES 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: XA- Do not requisition an XA-coded item. Order its next higher assembly. (Also, refer to the note below.) XB- If an XB item is not available from salvage, order it using CAGEC and part number given. XC- Installation drawing, diagram, instruction sheet, field service drawing, that is identified by 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.