Section I. INTRODUCTION
subgroup heading, and a brief description of the part
This maintenance allocation chart lists all
starting with the noun name. It also designates the
maintenance and repair operations authorized for the
operation to be performed such as service, adjust,
inspect, test, replace, repair, and overhaul.
b. Level of Maintenance.
(1) Operator or crew.
Operator or crew
Maintenance is any action taken to keep material in
maintenance performed by the user or
a serviceable condition or to restore it to serviceability
operator of the equipment, such as
when it is unserviceable.
Maintenance of materiel
servicing, cleaning, lubricating, and limited
includes the following:
adjustments. It also includes removal and
a. Service. To clean, to preserve, and to replenish
replacement of items to accomplish
servicing and lubrication.
To regulate periodically to prevent
(2) Organizational. Organizational maintenance
is that maintenance performed by trained
c. Inspect. To verify serviceability and to detect
personnel provided for that purpose in the
incipient mechanical failure by scrutiny.
using organization, such as replacement of
To verify serviceability and to detect
all items in the organizational column,
incipient mechanical failure by use of special equipment
limited parts fabrication from bulk material,
such as gages, meters, and other test devices.
adjustments, and repair of assemblies,
e. Replace. To substitute serviceable assemblies,
components, and end items that can be
f. Repair. To restore to a serviceable condition by
(3) Direct support. Direct support maintenance
replacing unserviceable parts or by any other action
is that maintenance performed by specially
required utilizing tools, equipment, and skills available, to
trained units in direct support of the using
include welding, grinding, riveting, straightening, and
organization, such as replacement of all
items in the organizational and direct
g. Overhaul. To restore an item to a completely
support columns; repair of assemblies,
serviceable condition by inspecting, disassembling its
components, and end items; and fabrication
assemblies and subassemblies as necessary, replacing
of parts from bulk material.
parts, and performing necessary boring, grinding, or
(4) General support.
machining operations, followed by reassembly and final
maintenance is that maintenance performed
by units organized as semi-fixed or
permanent shops to serve lower level
maintenance within a geographical area,
3. Explanation of Columns
a. Components and Related Operation.
column contains the functional index grouping heading,