The “L” maintenance level is not included in column (4) of the MAC. Functions to this level of  maintenance are identified by work time figure in the “H” column of column (4), and an  associated reference code is used in the REMARKS column (6). This code is keyed to the  remarks and the SRA complete repair application is explained there. Column (5) Tools and Equipment Reference Code. Column (5) specifies, by code, those common tool  sets (not individual tools), common Test, Measurement and Diagnostic Equipment (TMDE), and special  tools, special TMDE and special support equipment required to perform the designated function. Codes  are keyed to the entries in the tools and test equipment table.  Column (6) Remarks Code. When applicable, this column contains a letter code, in alphabetic order,  which is keyed to the remarks table entries. Column (1) - Tool or Test Equipment Reference Code. The tool or test equipment reference code  correlates with a code used in column (5) of the MAC.  Column (2) - Maintenance Level. The lowest level of maintenance authorized to use the tool or test  equipment.  Column (3) - Nomenclature. Name or identification of tool or test equipment.  Column (4) - National Stock Number (NSN). The NSN of the tool or test equipment.  Column (5) - Tool Number. The manufacturer’s part number.  Column (1) - Remarks Code. The code recorded in column (6) of the MAC.  Column (2) - Remarks. This column lists information pertinent to the maintenance function being  performed as indicated in the MAC.  0063 00-4 Change 2  Explanation of Columns in Remarks  Explanation of Columns in Tools and Test Equipment Requirements  NOTE  0063 00  TM 10-1670-287-23&P