h. Replace. To remove an unserviceable item and
install a serviceable counterpart in its place. "Replace" is
authorized by the MAC and is shown as the 3d position
code of the SMR code.
i. Repair. The application of maintenance services',
installation, and disassembly/assembly procedures3, 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.
(service/action) prescribed to restore an item to a
completely serviceable/ operational condition as required
by maintenance standards in appropriate technical
publications (i. e. , DMWR). Overhaul is normally the
highest degree of maintenance performed by the Army.
Overhaul does not normally return an item to like new
k. Rebuild. Consists of those services/actions
necessary for the restoration of unserviceable equipment
to a like new condition in accordance with original
manufacturing standards. Rebuild is the highest degree
of materiel 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 equipment/components.
B-4. FUNCTIONAL GROUPS (Section II, Columns 1
and 2). The functional group shown in Section II, under
columns 1 and J 2, identify maintenance significant
components, assemblies, and subassemblies with next
higher assembly. B-5. MAINTENANCE FUNCTION
(Section II, Column 3). Column 3 lists the functions to
be performed on the items listed in column 2.
B-6. MAINTENANCE CATEGORIES AND WORK
TIMES (Section II, Column 4). The maintenance
categories (levels) AVUM, AVIM, and DEPOT are listed
on the Maintenance 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 a maintenance level to perform a specified
maintenance function. If a work time has not been
established, the columnar presentation shall indicate
"____.____" Maintenance levels higher than the level of
maintenance indicated are authorized to perform the
B-7. TOOLS AND TEST EQUIPMENT (Section II,
Column 5, and Section III). Common tool sets (not
equipment required to perform maintenance functions are
listed alphabetically in Section III with a reference number
to permit crossreferencing to column 5 in the MAC. In
addition, the maintenance category authorized to use the
device is listed along with the item National stock number
(NSN) and, if applicable, the tool number to aid in
identifying the tool/device.
1Services inspect, test, service, adjust, aline, calibrate,
2Fault locate/troubleshoot the process of investigating
and detecting the cause of equipment malfunctioning; the
act of isolating a fault within a system or unit under test
3Disassemble/assemble encompasses the step-by-step
taking apart (or breakdown) of a spare/functional group
coded item to the level of its least componency identified
as maintenance significant (i.e., assigned an SMR code)
for the category of maintenance under consideration.
4Actions welding, grinding, riveting, straightening, facing,
remachining, and/or resurfacing.