MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
a. This section provides general explanation of all maintenance and repair functions authorized at various
b. Section II designates overall responsibility for the performance functions on the identified end item or
component. The implementation of the maintenance functions upon the end item or component will be consistent with
the assigned maintenance functions.
c. Section III lists the special tools and test equipment required for each maintenance function as referenced from
d. Section IV Contains supplemental instructions or explanatory notes required for a particular maintenance
B-2. Explanation of Columns in Section II
a. Group Number, Column (1). The group number is a numerical group assigned to each assembly to identify
components assemblies, subassemblies, and modules with the next higher assembly.
b. Assembly Group, Column (2). The applicable assembly groups are listed on the MAC in disassembly sequence
beginning with the first assembly removed in a top down disassembly sequence. This column contains brief description
of the components of each assembly group.
c. Maintenance Functions, Column (3). This column lists the various maintenance functions (A through K). The
upper case letter placed in the appropriate column indicates the lowest maintenance level authorized to perform these
functions. The symbol designations for the various maintenance levels are as follows:
C--Operator or crew
F--Direct support maintenance
The maintenance functions are defined as follows:
A-- INSPECT: To determine serviceability of an item by comparing its physical, mechanical, and electrical
characteristics with established standards.
B-- TEST: To verify serviceability and to detect electrical or mechanical failure by use of test equipment.
C-- SERVICE: To clean, to preserve, to charge, and to add fuel lubricants, cooling agents, and air. (If it is desired that
elements, such as painting and lubricating, be defined separately, the may be so listed)
D-- ADJUST: To rectify to the extent necessary to bring into proper operating range.
E-- ALIGN: To adjust specified variable elements of an item to bring to optimum performance.
F-- CALIBRATE: To determine the corrections to be made in the reading of instruments or test equipment used in
precise measurement. Consists of the comparison of two instruments, one of which is a certified standard of known
accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared with the certified
G-- INSTALL: To set up for use in an operational environment such as an emplacement, site, or vehicle.
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 level of maintenance.
J-- OVERHAUL: Normally, the highest degree of maintenance performed by the Army in order to minimize the time
work is in process 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 normally 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 condition in accordance with original manufacturing standards. Rebuild is performed only when required by
operational considerations or other paramount, factors and then only at the depot maintenance level. Rebuild
reduces to zero the hours or miles the equipment, or component thereof, has been in use.
d. Tools and Equipment, Column (4). This column is provided for referencing by code the special tools and test
equipment (sec. III). Required to perform the maintenance functions (sec. II).
e. Remarks, Column (5). This column is provided for referencing by code the remarks (sec. IV) pertinent to the
B-3. Explanation of Columns in Section III
a. Reference Code. This column consists of number and a letter separated by a dash. The number references the
T&TE requirements listed in section II. The letter represents the specific maintenance function the item is to be used with
in columns A through K of Section II.
b. Maintenance Level. This column shows the lowest level of maintenance authorized to use the special tools or test