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TM 10-4930-369-13&P
Actions. Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.
Explanation Of Columns In The MAC
Column (1) - Group Number. Column (1) lists Functional Group Code (FGC) numbers, the purpose of which is
to identify maintenance signiicant components, assemblies, subassemblies, and modules with the Next Higher
Assembly (NHA).
Column (2) - Component/Assembly. Column (2) contains the Item names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
Column (3) - Maintenance Function. Column (3) lists the functions to be performed on the Item listed in column (2).
(For a detailed explanation of these functions refer to "Maintenance Functions" outlined above.)
Column (4) Maintenance Level. Column (4) speciies each level of maintenance authorized to perform each
function listed in column (3), by indicating work time required (expressed as manhours in whole hours or decimals)
in the appropriate subcolumn. This work time igure represents the active time required to perform that maintenance
function at the indicated level of maintenance. If the number or complexity of the tasks within the listed maintenance
function varies at different maintenance levels, appropriate work time igures are to be shown for each level. The
work time igure represents the average time required to restore an Item (assembly, subassembly, component,
module, end Item, or system) to a serviceable condition under typical ield operating conditions. This time includes
preparation time (including any necessary disassembly/assembly time), troubleshooting/fault location time, and
quality assurance time in addition to the time required to perform the speciic tasks identiied for the maintenance
functions authorized in the MAC. The symbol designations for the various maintenance levels are as follows:
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