Explanation of Columns - TM-9-6625-2465-150046

h. Replace. To replace unserviceable items with serviceable

like items.

i. Repair. Those maintenance operations necessary to restore

an item to serviceable condition through correction of material

damage or a specific failure. Repair may be accomplished at each

category of maintenance.

j. Overhaul. Normally, the highest degree of maintenance per-

formed by the Army in order to minimize time work in process

is consistent with quality and economy of operation. It consists

of that maintenance necessary to restore an item to completely

serviceable condition as prescribed by maintenance standards in

technical publications for each item of equipment. Overhaul nor-

really does not return an item to like new, zero mileage, or zero

hour condition.

k. Rebuild. The highest degree of materiel maintenance. It

consists of restoring equipment as nearly as possible to new con-

dition in accordance with{ original manufacturing standards.

Rebuild is performed only when required by operational con-

siderations or other paramount factors " and then only at the

depot maintenance category. Rebuild reduces to zero the hours

or miles the equipment, or component thereof, has been in use.

l. Symbols. The uppercase letter placed in the appropriate

column indicates the lowest level at which that particular main-

tenance function is to be performed.

B-3. Explanation of Columns

Listed below is an explanation of the column shown in the main-

tenance allocation chart:

a. Column 1, Group Number. Column 1 lists group numbers,

the purpose of which is to identify components, assemblies, sub-

assemblies, and modules with the next higher assembly.

b. Column 2, Functional Group. Column 2 lists the names of

components, assemblies, subassemblies, and modules on which

maintenance is authorized.

c. Column 3, Maintenance Functions. Column 3 lists the lowest

level at which that particular maintenance function is to be per-

formed.

d. Column 4, Tools and Equipment. This column shall be used

to specify, by code, those tools and test equipment required to

perform the designated function.

e. Column 5, Remarks. Self-explanatory.

B-2