equipment (SE) to the squadrons. Squadron
maintenance personnel are usually assigned to the
squadron maintenance department. However, some
personnel may be assigned temporarily to the stations
or ships AIMD.
The term aircraft maintenance has a very general
meaning. It could mean the maintenance performed in
minutes at the squadron level to months of overhaul in
an industrial-type facility. More than the words
maintenance or aircraft maintenance are needed to
indicate a specific meaning. There are two major types
of maintenance-rework and upkeep. Categories
tvithin the major types of maintenance are standard
revvork and upkeep and special rework and upkeep.
The following paragraphs discuss these types and
categories of maintenance.
REWORK MAINTENANCE.Rework main-
tenance is the restorative or additive work performed
on aircraft, aircraft equipment, and aircraft SE. Naval
aviation depots, contractor plants, and other industrial
establishments do this type of maintenance. Standard
rework and special rework come under the general
heading of rework maintenance.
Standard Rework.Standard rework is a com-
prehensive depot-level inspection of selected aircraft
structures and materials, correction of critical defects,
incorporation of certain technical directives, and
limited removal and rework of scheduled removal
components (SRCs). It also includes equipment
history record (EHR), assembly service record (ASR),
and module service record (MSR) items. Standard
rework is commonly known as standard depot-level
Special Rework.Special rework is work done
to aircraft, aircraft equipment, and aircraft SE to
improve or change their capability to perform specific
functions. This is done by replacing or repairing parts
or equipment of the aircraft. Normally, special rework
is depot-level work.
UPKEEP MAINTENANCE.Upkeep main-
tenance is the preventive, restorative, or additive work
performed on aircraft, equipment, and SE by operating
units and aircraft SE activities. It includes servicing,
periodic inspection, functional and bench tests,
replacement, preservation, modification, and repair.
Upkeep is divided into two categories, standard and
special. Military and contractor personnel perform
upkeep. The aircraft controlling custodians (ACCs)
manage the process.
Standard Upkeep.Standard upkeep main-
tenance is the periodic or scheduled work performed
on aircraft, equipment, and SE after (and as a result of)
completion of a prescribed number of flying hours or
calendar days. Such work is performed in compliance
with prescribed inspection or replacement
requirements, and is also known as scheduled
Special Upkeep.Specialupkeep is the work
done to aircraft, equipment, and SE to improve,
change, or restore their capability to perform specific
mission functions. Special upkeep maintenance
includes replacement, removal, addition, alteration, or
repair of parts, equipment, or aircraft without regard
to flying hours or operating times, and is also known
as unscheduled maintenance.
Q3. What are the major types of aircraft
Q4. The restorative or additive work performed on
aircraft, equipment, or support equipment is
what type of maintenance?
Q5. Standard rework is also known as what type of
Q6. What is special rework?
Q7. Upkeep maintenance is performed by what
Q8. Standard upkeep is also known as what type of
Q9. Maintenance performed on aircraft without
regard to operating hours or calendar is known
as what type of maintenance?
All aircraft maintenance functions are divided into
three distinct levels-organizational, intermediate, and
depot. To determine the extent to which a repair task
can be undertaken, the maintenance activity refers to
the maintenance instruction manuals (MIMs), the
operating and service instruction manuals, or the
technical directives (TDs) that pertain to each weapon
system or component. The levels of maintenance are
discussed in the following paragraphs.
Organizational-level maintenance is work
performed by an operating unit on a day-to-day basis
in support of its own operations. Maintenance