Explanation of Columns in the MAC, Section II

APPENDIX B MAINTENANCE ALLOCATION CHART - TM-5-4930-244-14_439

Explanation of Columns In Tool and Test Equipment Requirements, Section III.

TM-5-4930-244-14 Closed Circuit Refueling Nozzle Assembly Manual
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TM 5-4930-244-14 g. Remove/lnstall. To remove and install the same item when required to perform service or other maintenance functions. Install may be the act of placing, seating, or fixing into position a spare, repair part, or module (component or assembly) in a manner to allow the proper functioning of an equipment or system. h. Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace" is authorized by the MAC and assigned maintenance level is shown as the 3d position code of the SMR code. i. Repair. The application of maintenance services including fault location/troubleshooting², removal/installation, and disassembly/assembly³ procedures, and maintenance actions⁴, to identify troubles and restore serviceability to an item by correcting specific damage, fault, malfunction, or failure in a part, subassembly, module (component or assembly), end item, or system. j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely serviceable/operational condition as required by maintenance standards in appropriate technical publications (i.e., DMWR). Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul does not normally return an item to like new condition. k. Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment to a 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 (e g., hours/miles) considered in classifying Army equipment/components. ¹Services Inspect, test, service, adjust, align, calibrate, and/or replace. ²Fault location/troubleshooting The process of investigating and detecting the cause of equipment malfunctioning; the act of isolating a fault with in a system or unit under test (UUT). ³Disassembly/assembly The step-by-step breakdown (taking apart) of a spare/functional group coded Item to the level of its least component, that is assigned an SMR code for level of maintenance under consideration (i.e., identified as maintenance significant). ⁴Actions Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing. B-3. Explanation of Columns in the MAC, Section II. a. Column 1, Group Number. Column 1 lists functional group code numbers, the purpose of which is to identify maintenance-significant components, assemblies, subassemblies, and modules with the next higher assembly. b. Column 2, Component/Assembly. Column 2 contains the item names of components, assemblies, subassemblies, and modules for which maintenance is authorized. c. Column 3, Maintenance Function. Column 3 lists the functions to be performed on the Item listed in Column 2. (For detailed explanation of these functions, see paragraph B-2.). d. Column 4, Maintenance Level. Column 4 specifies, by the listing of a work time figure in the appropriate sub-column(s), the category 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 level of maintenance. If the number or difficulty of the tasks within the listed maintenance function varies at different maintenance levels, appropriate work time figures will be shown for each level. The work time figure represents the average time required to restore an item (assembly, subassembly, component, module, end item, or system) to a serviceable condition under typical field operating conditions. This time includes preparation time (including any necessary disassembly/assembly time), B-2

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