TM 55-4920-401-13&P
repair will be evacuated to Depot Maintenance
This level will per-form special inspections which ex-
ceed AVUM capability. Provides quick response
maintenance support, on-the-job-training, and tech-
nical assistance through the use of mobile mainte-
nance contact teams. Maintains authorized oper-
ational readiness float. Provides collections and
classification services for serviceable/unserviceable
material. Operates a cannibalization activity in ac-
cordance with AR 750-50. (The aircraft mainte-
nance company within the maintenance battalion
of a division will perform AVUM functions consis-
tent with air mobility requirements and conser-
vation of personnel and equipment resources. Addi-
tional intermediate maintenance support will be
provided by the supporting non-divisional AVIM
unit).
B-2. Use of the Maintenance Allocation Chart.
a. The MAC assigns maintenance functions to
the lowest level of maintenance based on past ex-
perience and the following consideration:
(1) Skills available.
(2) Time required
(3) Tools and lest equipment required and/or
available.
b. Only the lowest level of maintenance author-
ized to perform a maintenance function is indicated.
If the lowest level of maintenance cannot perform
all tasks of any single maintenance function (e.g.,
test, repair), then the higher maintenance level(s)
that can accomplish additional tasks will also be in-
dicated.
c. A maintenance function assigned to a mainte-
nance level will automatically be authorized to be
performed at any higher maintenance level.
d. A maintenance function that cannot be per-
formed at the assigned level of maintenance for any
reason may be evacuated to the next higher mainte-
nance organization. Higher maintenance levels will
perform the maintenance functions of lower main-
tenance levels when required or directed by the ap-
propriate commander.
e. The assignment of a maintenance function
will not be construed as authorization to carry the
associated repair parts in stock. Authority to requi-
sition, stock, or otherwise secure necessary repair
parts will be as specified in the repair parts and spe-
cial tools list appendix.
f. Normally there will be no deviation from the
assigned level of maintenance. In cases of oper-
ational necessity, maintenance functions assigned
to a maintenance level may, on a one-time basis and
at the request of the lower maintenance level, be
specifically authorized by the maintenance officer
of the level of maintenance to which the function is
assigned. The special tools, equipment, etc. required
by the lower level of maintenance to perform this
function will be furnished by the maintenance level
to which the function is assigned. This transfer of a
maintenance function to a lower maintenance level
does not relieve the higher maintenance level of the
responsibility
of the function.
The higher
level of maintenance has the authority to
determine:
(1) If the lower level is capable of per-
forming the work,
(2) If
the
lower
level
will
require
assistance or
technical
supervision
and
on-site inspection.
(3) If
the
authorization
will
be
granted.
g. Organizational through depot maintenance of
the US Army Electronics Command equipment will
be performed by designated US Army Electronics
Command personnel.
h. Changes to the MAC wll be based on con-
tinuing evaluation and analysis by responsible
technical personnel and on reports received from
field activities.
B-3. Definitions.
a. Inspect. To determine serviceability of an
item by comparing its physical, mechanical and
electrical characteristics with established stan-
dards.
b. Test. To verify serviceability and detect incip-
ient failure by measuring the mechanical or elec-
trical characteristics of an item and comparing
those characteristics with prescribed standards.
c. Service. To clean, to preserve, to charge, and
to add fuel, lubricants, cooling agents and air.
d. Adjust. To rectify to the extent necessary to
bring into proper operating range.
e. A line. To adjust specified variable elements
of an item to bring to optimum performance.
B-2
Change 2
