EXPLANATION OF COLUMNS IN THE REPAIR PARTS LISTS WORK PACKAGES - CONTINUED
Do not requisition an "XA" coded item. Order the next higher assembly. (Refer to
If an item is not available from salvage, order it using the CAGEC and P/N.
Installation drawings, diagrams, instruction sheets, field service drawings;
identified by manufacturer's P/N.
Item is not stocked. Order an XD-coded item through normal supply channels
using the CAGEC and P/N given, if no NSN is available.
Cannibalization of 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 750-1.
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) Third Position. The maintenance code entered in the third position tells you the lowest mainte-
nance 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:
Crew or Operator maintenance done within Field maintenance.
Unit Level maintenance can remove, replace, and use the item.
Direct Support maintenance can remove, replace, and use the item.
General Support maintenance can remove, replace, and use the item.
Specialized Repair Activity (SRA) can remove, replace, and use the item.
Depot Maintenance can remove, replace, and use the item.
(b) Fourth Position. The maintenance code entered in the fourth position tells you whether or not the
item is to be repaired and identifies the lowest maintenance level with the capability to do complete
repair (perform all authorized repair functions).