The application of maintenance servicesl, including fault
location/troubleshooting2, removal installation, disassembly/assembly3 procedures
and maintenance actions4, to identify troubles and restore serviceability to an item
by correcting specific damage, fault, malfunction or failure in a part, subassembly,
module (component or assembly), end item or system.
That maintenance effort (service/action) prescribed to restore
an item to a completely serviceable/operational conditions as required by mainte-
nance standards in appropriate technical publications (i.e., DMWR).
normally the highest degree of maintenance performed by the Army.
Overhaul does not
normally return an item to like-new condition.
Consists of those services/actions necessary for the restoration
of unserviceable equipment to a like-new condition in accordance with original manu-
Rebuild is the highest degree of material maintenance applied
to Army equipment.
The rebuild operation includes the act of returning to zero
those age measurements (hours/miles, etc.) considered in classifying Army
1 Services - inspect, test, service, adjust, align, calibrate and/or replace.
2 Fault locate/troubleshoot - The process of investigating and detecting the cause
of equipment malfunction; the act of isolating a fault within a system or unit
under test (UUT).
- encompasses the step-by-step taking apart (or breakdown)
of a spare/functional group coded item to the level of its least componency identi-
fied as maintenance significant (i.e., assigned an SMR code) for the category of
maintenance under consideration.
4 Actions - welding, grinding, riveting, straightening, facing, remachining and/or
B-4 FUNCTIONAL GROUPS (Columns 1 and 2)
The functional groupings shown in the sample below identify maintenance significant
components, assemblies, subassemblies and modules with the next higher assembly.
B-5 MAINTENANCE FUNCTION (Column 3)
Column 3 lists the functions to be performed on the items listed in column 2.
B-6 MAINTENANCE CATEGORIES AND WORK TIMES (Column 4)
The maintenance categories (levels) AVUM, AVIM and DEPOT are listed on the Mainte-
nance Allocation Chart with individual columns that include the work times for
maintenance functions at each maintenance level.
Work time presentations such as
"0.1" indicate the average time it requires to maintenance level to perform a spec-
ified maintenance function.
If a work time has not been established, the columnar
presentation shall indicate "X".
Maintenance levels higher than the level of