SECTION I. INTRODUCTION
This appendix provides a summary of the maintenance operations for the J-2317/U and J-2317A/U. It
authorizes categories of maintenance for specific maintenance functions on repairable items and components
and the tools and equipment required to perform each function. This appendix may be used as an aid in
planning maintenance operations.
A-2. Maintenance Function
Maintenance functions will be limited to and defined as follows:
a. Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or
electrical characteristics with established standards through examination.
b. Test. To verify serviceability and to detect incipient failure by measuring the mechanical or electrical
characteristics of an item and comparing those characteristics with prescribed standards.
c. Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean,
preserve, drain, paint, or to replenish fuel/lubricants/hydraulic fluids or compressed air supplies.
d. Adjust. Maintain within prescribed limits by bringing into proper or exact position, or by setting the
operating characteristics to the specified parameters.
e. Align. To adjust specified variable elements of an item to about optimum or desired performance.
f. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test
measuring and diagnostic equipment used in precision measurement. Consists of the comparison of two
instruments, one of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the
accuracy of the instrument being compared.
g. Install. The act of emplacing, seating, or fixing into position an item, part, module (component or
assembly) in a manner to allow the proper functioning of the equipment/system.
h. Replace. The act of substituting a serviceable like-type part, subassembly, model (component or
assembly) for an unserviceable counterpart.
i. Repair. The application of maintenance services (inspect, test, service, adjust, align, calibrate, replace)
or other maintenance actions (welding, grinding, riveting, straightening, facing, remachining, or resurfacing) to
restore serviceability to an item by correcting specific damage, fault, malfunction, or failure in a part,
subassembly, module/component/assembly, end item or system. This function does not include the trial and
error replacement of running spare type items such as fuses, lamps, or electron tubes.
i. Overhaul. That periodic maintenance effort (service/action) necessary to restore an item to a completely
serviceable/operational condition as prescribed by maintenance standards (e.g., DMWR) in appropriate
technical publications. Overhaul is normally the highest degree of maintenance performed by the Army.
Overhaul does not normally return an item to like-new condition.
of those services/actions necessary for the restoration
of unserviceable equipment
like-new condition in accordance with original manufacturing standards. Rebuild is the highest degree of
material maintenance applied to Army equipment. The rebuild operation includes the act of returning to zero
those age measurements (hours, miles, etc.) considered in classifying Army equipment/components.
A-3. Column Entries
a. Column 1:, Group Number. Column 1 lists group numbers, the purpose of which is to identify components,
assemblies, subassemblies and modules with the next higher assembly.
b. Column 2, Component/Assembly. Column 2 contains the noun names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
c. Column 3, Maintenance Functions. Column 3 lists the functions to be performed on the item listed in
column 2. When items are listed without maintenance functions, it is solely for purpose of having the group
numbers in the MAC and RPSTL coincide.
d. Column 4, Maintenance Category. Column 4 specifies, by the listing of a "worktime" figure in the
appropriate subcolumn(s), the lowest level of maintenance authorized to perform the function listed in
column 3. This figure represents the active time required to perform that maintenance function at the indicated