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TM-11-5815-334-20P-1 Radio Teletypewriter Set AN/GRC-142B (NSN
Next
Explanation of Columns (Section IV)
.
TM 11-5815-334-20P-1
Code
Explanation
XA--DO not requisition an "XA" coded item. Order its next higher assembly.
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 identified by 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, maybe 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.
Application/Explanation
Code
C--Crew or operator maintenance done within organizational or aviation maintenance.
O--Organizational or aviation unit category can remove, replace, and use the item.
F--Direct support or aviation intermediate category can remove, replace, and use the item.
H--General support category can remove, replace, and use the item.
L--Specialized repair activity can remove, replace, and use the item.
D--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 au-
thorized repair functions). This position will contain one of the following maintenance codes.
NOTE
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.
Application/Explanation
Code
O--Organizational or aviation unit is the lowest category that can do complete repair of the item.
F--Direct support or aviation intermediate is the lowest category that can do complete repair of the item.
H--General support is the lowest category that can do complete repair of the item.
L--Specialized repair activity (designate the specialized repair activity) is the lowest category that can do complete
repair of the item.
D--Depot is the lowest category that can do complete repair of the item.
Z--Nonreparable. No repair is authorized.
B--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:
3

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