|
| |
TM 55-4920-383-13&P
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. Maintenance Allocation Chart.
a. This Maintenance Allocation Chart (MAC)
assigns maintenance functions in accordance with
the Three Levels of Maintenance concept for army
aircraft.. These maintenance levels: Aviation Unit
Maintenance (AVUM), Aviation Intermediate
Maintenance (AVIM) and Depot Maintenance are
depicted on the MAC as:
AVUM which corresponds to the O code in the
Repair Parts and Special Tools List (RPSTL).
AVIM which corresponds to the F code in the
Repair Parts and Special Tools List (RPSTL).
Depot which corresponds to the D code in the
Repair Parts and Special Tools List (RPSTL).
b. The maintennace to be performed below depot
and in the fiels is described as follows:
(1) Aviation Unit Maintenance (AVUM).
AVUM activities will be staffed and equipped to
perform high frequency “On-Equipment”
maintenance tasks required to retain or return
equipment to a
serviceable condition. The
maintenance capability of the AVUM will be
governed by the MAC and limited by the amount
and complexity of support equipment, facilities re-
quired, and number of spaces and critical skills
available. The range and quantity of authorized
spare modules/components will be consistent with
the mobility requirements dictated by the air
mobility concept. (Assignment of maintenance
tasks to divisional company size aviation units
will consider the overall maintenance capability of
the division, the requirement to conserve person-
nel and equipment resources and air mobility re-
quirements).
(a) Company Size Aviation Units. Perform
those tasks which consist primarily of preventive
maintenance and maintenance repair and replace-
ment functions associated with sustaining a high
level of equipment. operational readiness. Perform
maintenance inspections and servicing to include
daily, intermediate, periodic and special inspec-
tions as authorized by the MAC or higher head-
quarters. Identify the cause of equipment/system
malfunctions using applicable technical manual
troubleshooting instructions, Built-In-Test Equip-
ment (BITE), installed instruments, or easy to use
Test Measurement and Diagnostic Equipment
(TMDE). Replace worn or damaged modules/com-
ponents or system alignment and which can be
removed/installed with available skills, tools and
equipment. Perform operational and continuity
checks and make minor repairs. Perform servicing,
functional adjustments, and minor repair/replace-
ment. Evacuate unserviceable modules/com-
ponents and end items beyond the repair capabili-
ty of AVUM to the supporting AVIM.
(b) Less than Company Size Aviation Units.
Aviation elements organic to brigade, group, bat-
talion headquarters and detachment size units are
normally small and have less than ten aircraft
assigned. Maintenance tasks performed by the air-
craft crew chief or assigned aircraft repairman will
normally be limited to preventive maintenance in-
spections, servicing, spot painting, stop drilling,
minor adjustments,
module/component fault
diagnosis
a n d r e p l a c e m e nt
o f s e l e c t ed
modules/components. Repair functions will nor-
mally be accomplished by the supporting AVIM
unit.
(2) Aviation Intermediate Maintenance
(AVIM). AVIM provides mobile, responsive “One
Stop” maintenance support. (Maintenance func-
tions which are not conductive to sustaining air
mobility will be assigned to depot maintenance).
Performs all maintenance functions authorized to
be done at AVUM. Repair of equipment for return
to user will emphasize support or operational
readiness requirements. Authorized maintenance
includes replacement and repair of modules/com-
ponents and end items which can be accomplished
efficiently with available skills, tools, and equip-
ment. Establishes the Direct Exchange (DX) pro-
gram for AVUM units be repairing selected items
for return to stock when such repairs cannot be ac-
complished at the AVUM level. Inspects,
troubleshoots, tests, diagnoses, repairs, adjust,
calibrates,
and aligns system modules/com-
ponents. Module/component disassembly and
repair will support the DX program and will nor-
mally be limited to tasks requiring cleaning and
the replacement of seals, fittings and items of com-
m o n h a r d w a r e .
U n s e r v i c e a b l e r e p a r a b le
modules/components and end items which are
beyond the capability of AVIM to repair will be
evacuated to Depot Maintenance. This level will
perform special inspections which exceed AVUM
capability. Provides quick response maintenance
B-1
|
