Quantcast Maintenance Code - TM-55-4920-439-13-P0087 4920-01-139-4534">

 

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Source Code - TM-55-4920-439-13-P0086
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TM-55-4920-439-13-P Electric/Instrument Shop P/N SC-4920-97-CL-A62 NSN
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Recoverability Code - TM-55-4920-439-13-P0088
TM 55-4920-439-13&P
Code
Explanation
AO - (Assembled by
org/AVUM
Category
Items with these codes are not to be requested/requisitioned individually. The parts that make
AF - (Assembled by
up the assembled item must be requisitioned or fabricated and assembled at the category of
(DS/AVIM
maintenance indicated by the source code. If the 3d position code of the SMR code authorizes
Category)
you to replace the item, but the source code indicates the item is assembled at a higher
AH - (Assembled by
category, order the item from the higher category of maintenance.
GS Category)
AD - (Assembled by
Depot)
XA -
Do not requisition an "XA"-coded item. Order its next higher assembly. (Also, re fer to the NOTE below.)
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, 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 700-42.
(2) Maintenance Code.  Maintenance codes tell you the category(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 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.
Code
Application/Explanation
C
- Crew or operator maintenance done within organizational or aviation unit
maintenance.
O
- Organizational or aviation unit category can remove, replace, and use the hem.
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.
C-3

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