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EXPLANATION OF COLUMNS IN THE MAC - TM-9-4520-257-12P_176
TABLE 1.  MAC FOR HEATER, SPACE, RADIANT, LARGE (H-45)

TM-9-4520-257-12P Compressor Air Rotary Diesel Engine Driven Skid Mounted 125 cfm at 100 psi Manual
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TM 9-4520-257-12&P                                                        0041 00 0041 00-3 Column (3) –  Maintenance Function.  Column 3 contains the functions to be performed on the item listed in Column 2.  (For a detailed explanation, refer to the previous section entitled “Maintenance Functions”.)   Column (4) – Maintenance Level.  Column 4 contains, by the listing of a work time figure (expressed as man-hours shown as whole hours or decimals) in the appropriate subcolumn(s), the 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 level of maintenance.  If the number or the complexity of the tasks within the listed maintenance function vary 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 item preparation (such as any necessary disassembly/assembly time), troubleshooting/fault location time, and quality assurance/quality control time in addition to the time required to perform the specific tasks identified for the maintenance functions authorized in the MAC.  The system designations for the various maintenance levels are shown below:   C ……. Operator or crew F ……. Direct Support Maintenance D ……. Depot Maintenance O     ……. Unit Maintenance    H ……. General Support Maintenance Column (5) – Tools and Equipment.  Column 5 contains, by code, those common tool sets (not individual tools), common TMDE and special tools, special TMDE, and support equipment required to perform the designated function. Column (6) – Remarks.  Column 6, when applicable, contains a letter code, in alphabetic order, which is keyed to the remarks contained in Table 3.   EXPLANATION OF COLUMNS IN THE TOOLS AND TEST EQUIPMENT REQUIREMENTS Column (1) – Tool or Test Equipment Reference Code.  Column 1 contains the tool or test equipment reference code that correlates with a code used in Column 5 of the MAC. Column (2) – Maintenance Level.  Column 2 contains the lowest level of maintenance authorized to use the tool or test equipment. Column (3) – Nomenclature.  Column 3 contains the name or identification of a tool or test equipment. Column (4) – National Stock Number (NSN). Column 4 contains the NSN of the tool or test equipment. Column (5) – Tool Number.  Column 5 contains the manufacturer’s part number, model number, or type number. EXPLANATION OF COLUMNS IN REMARKS Column (1) – Remarks Code.  Column 1 contains the code recorded in Column 6 of the MAC. Column (2) – Remarks.  Column 2 contains the information pertinent to the maintenance function being performed as indicated in the MAC.







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