MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
C -- Operator or crew
O -- Organizational maintenance
a. This section provides a general explanation of
all maintenance and repair functions authorized at
F -- Direct support maintenance
various maintenance levels.
H -- General support maintenance
b. Section II designates overall responsibility for
O -- Depot maintenance
the performance of maintenance operations on the
The maintenance functions are defined as follows:
identified end item or component. The implementation
A- Inspect: Verify serviceability and detect incipient
of the maintenance tasks upon the end item or
electrical or mechanical failure by close visual
component will be consistent with the assigned
B- Test: Verify serviceability and detect incipient
electrical or mechanical failure by measuring
equipment required for each maintenance operation as
the mechanical or electrical characteristics of
reference from section II.
the item and comparing those characteristics
with authorized standards. Tests will be made
explanatory notes and/or illustrations required for a
commensurate with test procedures and with
particular maintenance function.
calibrated tools and/or test equipment
referenced in the Maintenance Assignment.
C- Service: Operations required periodically to
a. Functional Group Number. The functional group
keep the item in proper operating condition, i.e.,
is-a numerical group set up on a functional basis. The
to clean, preserve, drain, paint, and replenish
applicable functional grouping indexes (obtained from
fuel, lubricants, hydraulic, and deicing fluids, or
TB 750-93 1, Functional Grouping Codes) are listed on
compressed air supplies.
the Maintenance Assignment in the appropriate
D- Adjust: Regulate periodically to prevent
numerical sequence. These indexes are normally set up
Adjustments will be made
in accordance with their function and proximity to each
commensurate with adjustment procedures and
associated equipment adjustment specifications.
b. Component Assembly Nomenclature.
E- Align: Adjust two or more components of an
column contains a brief description of the components
electrical or mechanical system so that their
of each functional group.
functions are properly synchronized or adjusted.
c. Maintenance Functions. This column lists the
F- Calibrate: Determine, check, or rectify the
various maintenance functions (A through K) and
graduation of an instrument, weapon, or
indicates the lowest maintenance category authorized to
weapons system or components of a weapons
perform these operations. The symbol designations for
the various maintenance categories are as follows: