Install . To set up for use in an operational environment such as an emplacement, site, or vehicle.
Replace. To replace unserviceable items with serviceable assemblies, subassemblies, or parts.
Repair. To restore an item to serviceable condition.
This includes, but is not limited to, inspection, cleaning,
preserving, adjusting, replacing, welding, reveting, and strengthening.
(10) Overhaul. To restore an item to a completely serviceable condition as prescribed by maintenance serviceability
standards prepared and published for the specific item to be overhauled.
(11) Rebuild. To restore an item to a standard as nearly as possible to original or new condition in appearance,
performance, and life expectancy. This is accomplished through complete disassembly of the item, inspection of all parts or
components, repair or replacement of worn or unserviceable elements (items) using original manufacturing tolerances and
specifications, and subsequent reassembly of the item.
(12) Symbols . The symbol, O, F, H, or D placed in the appropriate column indicates the level responsible for performing that
particular maintenance function. The symbol "%%" which applies to organizational maintenance indicates that the particular
maintenance function may be performed provided it is specifically authorized by the direct support maintenance officer. Use of the
symbol will apply only to replacement of major assemblies and time-consuming operations which are within the capabilities of
organization but over which control by the commodity commands is considered essential. In no case will the direct support
maintenance officer require the accomplishment of a "%%" maintenance function by an organization or unit, and in no case will a "%%"
function authorize stockage of parts at organizational level.
d. Column 4, Tools and equipment. This column will be used to specify, by code, those tools and test equipment required to
perform the designated function.
Column 5, Remarks . Self-explanatory.
a. A maintenance function assigned to a maintenance level, which for any reason is beyond its capability, becomes the
responsibility of the next higher maintenance level.
b. The authority to perform a maintenance function does not constitute authority to requisition or otherwise secure necessary
repair parts as specified in current supply directives.