TM 10-1670-299-20&PTO 14D1-2-470-2NAVAIR 13-1-41B-3. Explanation of Columns in the MAC, Section II. (CONT)b. Column2,Component/Assembly. Column 2 contains the item names of components, assemblies,subassemblies, and modules for which maintenance is authorized.c. Column3,MaintenanceFunctions. 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. Column4,MaintenanceLevel. Column 4 specifies each level of maintenance authorized to perform eachfunction listed in Column 3, by indicating work time required (expressed as man-hours in whole hours or decimals) in theappropriate subcolumn. This work-time figure represents the active time required to perform that maintenance functionat the indicated level of maintenance. If the number or complexity of the tasks within the listed maintenance functionvaries at different maintenance levels, appropriate work-time figures are to be shown for each level. The work-timefigure represents the average time required to restore an item (assembly, subassembly, component, module, end item orsystem) to a serviceable condition under typical field operating conditions. This time includes preparation time (includingany necessary disassembly/assembly time), troubleshooting/fault location time, and quality assurance time in addition tothe time required to perform the specific tasks identified for the maintenance functions authorized in the maintenanceallocation chart. The symbol designations for the various maintenance levels are as follows:C.................. Operator or crew maintenanceO.................. Unit maintenanceF.................. Direct support maintenanceL.................. Specialized Repair Activity (SRA)5H.................. General support maintenanceD.................. Depot maintenance------------------------5This maintenance level is not included in Section II, column (4) of the Maintenance Allocation Chart. Functions tothis level of maintenance are identified by a work-time figure in the "H" column of Section II, column (4), and anassociated reference code is used in the Remarks column (6). This code is keyed to Section IV, Remarks, and the SRAcomplete repair application is explained there.B-4
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