Source code. The source code tells you how to get an item needed for maintenance, repair, or overhaul of an end
item/equipment. Explanations of source codes follows
request/requisition items with these source codes. They
are authorized to the level indicated by the code entered
in the third position of the SMR code.
Items coded PC are subject to deterioration.
Items with these codes are not to be requested/
requisitioned individually. They are part of a kit which is
authorized to the maintenance category indicated in the
third position of the SMR code. The complete kit must
be requisitioned and applied.