Section I Code Application/Explanation PA Stocked items; use the applicable NSN to PB request/requisition items with these source PC" codes. They are authorized to the category PD indicated by the code entered in the 3d PE position of the SMR code. PF PG **ltems coded PC are subject to deterioration. KD Items with these codes are not to be re- KF quested/requisitioned individually.They are KB part of a kit which is authorized to the maintenance category indicated in the 3d position of the SMR code. The complete kit must be requisitioned and applied. MO-(Made at UMI Items with these codes are not A VUM Level) to be requested/requisitioned MF-(Made at IDS/ individually.  They  must  be made from bulk material which Is identified by the part num- MH-(Made at IGS ber in   the  DESCRIPTION Level) AND    USABLE  ON  CODE (UOC) column and listed in ML-(Made at Spe- the Bulk Material group of the cialized Repair repair parts list in this RPSTL. Act (SRA)) If the item is authorized to you MD-(Made at Depot) by the 3d 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 main- tenance. AO-(Assembled by Items with these codes are not UM/AVUMLevel) to be requested/requisitioned AF-(Assembled by individually.  The  parts  that IDS/A VIM Level) make up the assembled item must be requisitioned or fabri- AH-(Assembled by cated and assembled at the IGS Category level of maintenance indicated by the source code. If the 3d AL-(Assembled by position code of the SMR code SRA) authorizes you to replace the AD-(Assembled by item, but the source code indi- cates the item is assembled at a higher level, order the item from the higher level of main- tenance. XA -     Do   not   requisition   an   "XA"coded item. Order its next higher assembly. (Also, refer to the NOTE above.) TM5-3810-294-20P XB- If an "XB" item is not available from salvage, order it using the FSCM and part number given. XC- Installation drawing, diagram, instruction sheet, field service drawing, that is iden- tified by the manufacturer’s part number. XD- Item is not stocked. Order an "XD"-coded item through normal supply channels using the FSCM and part number given, if no NSN is available. NOTE: Cannibalization or controlled exchange, when authorized, may be used as source of supply for items with the above source codes, except for those source coded "XA" or those aircraft support items restricted by requirements of AR 700-42. (2) Maintenance Code. Maintenance codes tell you the level(s) of maintenance authorized to USE and REPAIR support items. The maintenance codes are entered in the third and fourth positions of the SMR Code as follows: (a) The maintenance code entered in the third position tells you the lowest maintenance level authorized to remove, replace, and use an item. The maintenance code entered in the third position will indicate authorization to one of the following levels of maintenance. Code            Application/Explanation C- Crew or operator maintenance done within unit maintenance or aviation unit maintenance. O- Unit maintenance or aviation unit category can remove, replace, and use the item. F- Intermediate Direct Support or aviation intermediate level can remove, replace, and use the item. H- Intermediate General support level can remove, replace, and use the item. L- Specialized repair activity can remove, replace, and use the item. D- Depot level can remove, replace, and use the item. (b) The maintenance code entered in the fourth position tells whether or not the item is to be repaired and identifies the lowest maintenance level with the capability to-do complete repair (i.e.,perform all authorized repair functions.) (NOTE: Some limited repair may be done on the item at a lower level of maintenance, if authorized by the Maintenance Allocation Chart (MAC) and SMR codes.) This position will contain one of the following maintenance codes: 2