Do not requisition an "XA" coded item. Order its next higher assembly.
If an "XB' item is not available from salvage, order it using the FSCM and part number given.
Installation drawing, diagram, instruction sheet, field service drawing that is identified by manufacturers part
ltem is not stocked. Order an "XD" coded item through normal supply channels using the FSCM and part number
given, if no NSN is available.
Cannibalization or controlled exchange, when authorize may be used as a 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 750-1.
(2) Maintenance code Maintenance codes tell you the category 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 category authorized to remove,
replace, and use an item. The maintenance code entered in the third position will indicate authorization to one of the following
categories of maintenance.
Crew or operator maintenance done within organizational or aviation maintenance.
Organizational or aviation unit category can remove, replace, and use the item.
Direct support or aviation intermediate category can remove, replace, and use the item.
General support category can remove, replace, and use the item.
Specialized repair activity can remove, replace, and use the item.
Depot category 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 category with the capability to do complete repair ( i. e., perform all authorized repair functions). This
position will contain one of the following maintenance codes.
Some limited repair may be done on the item at a lower category of maintenance, if
authorized by the maintenance Allocation Chart (MAC) and SMR codes.
Organizational or aviation unit is the lowest category that can do complete repair of the item.
Direct support or aviation intermediate is the lowest category that can do complete repair of the item.
General support is the lowest category that can do complete repair of the item.
Specialized repair activity (designate the specialized repair activity) is the lowest category that can do complete repair
of the item.
Depot is the lowest category that can do complete repair of the item.
Nonreparable. No repair is authorized.
No repair is authorized. (No parts or special tools are authorized for the maintenance of a" B" coded item). However,
the item may be reconditioned by adjusting, lubricating, etc., at the user category.
(3) Recoverability code. Recoverability codes are assigned to items to indicate the disposition action on unserviceable
items. The recoverability code is entered in the fifth position of the SMR Code as follows:
Nonreparable item. When unserviceable, condemn and dispose of the item at the category of maintenance shown in
the third position of SMR Code.
Reparable item. When uneconomically repairable, condemn and dispose of the item at organzational or aviation unit
Reparable item. When uneconomically reparable, condemn and dispose of the item at direct support or aviation
Reparable item. When uneconomically reparable, condemn and dispose of the item at general support category.
Reparable item. When beyond lower category repair capability, return to depot. Condemnation and disposal of item
not authorized below depot category.
Reparable item. Condemnation and disposal not authorized below specialized repair activity (SRA).
Item required special handling or condemnation procedures because of specific reasons (e. g., precious metal
content, high dollar value, critical material, or hazardous material). Refer to appropriate manuals/directives for