B-3. COLUMN ENTRIES
a. COLUMN 1: GROUP NUMBER. Identifies components, assemblies, subassemblies and modules
with next higher assembly.
b. COLUMN 2: COMPONENT/ASSEMBLY. Lists the noun names of components, assemblies,
subassemblies and modules for which maintenance is authorized.
c. COLUMN 3: MAINTENANCE FUNCTIONS. Lists functions to be performed on item listed in Col-
umn 2. When items are listed without maintenance functions, it is only to have group
numbers in MAC and RPSTL coincide.
d. COLUMN 4: MAINTENANCE CATEGORY. Lists a "work time" figure in the appropriate sub-
column(s) to show the lowest level of maintenance authorized to perform the function listed
in Column 3. If number or complexity of tasks within limited maintenance function varies at
different maintenance categories, appropriate "work time" figures will be shown for each
category. Task-hours specified by "work time" figures represent the average time needed to
restore a subassembly, module (component or assembly), end item or system to serviceable
conditions under typical field operating conditions. The "work time" figure includes prepara-
tion time, troubleshooting time and quality assurance/quality control time as well as time re-
quired to perform specific tasks identified for maintenance functions authorized in the
maintenance allocation chart (MAC). Subcolumns of Column 4 are as follows:
- Direct Support
- General Support
e. COLUMN 5: TOOLS AND EQUIPMENT. Specifies by code those common tool sets (not in-
dividual tools) and special tools, test and support equipment needed to perform the
f. COLUMN 6: REMARKS. Contains an alphabetic code leading to the appropriate remark in B-5
(below) for the item opposite each code.
B-4. TOOLS AND TEST EQUIPMENT REQUIREMENTS
a. TOOL OR TEST EQUIPMENT REFERENCE CODE. Numbers in this column coincide with
numbers used in Column 5 of the MAC and indicate applicable tool or test equipment for
b. MAINTENANCE CATEGORY. Codes in this column indicate maintenance category allocated
the tool or test equipment.
c. NOMENCLATURE. Lists noun name and nomenclature of tools and test equipment needed to
perform maintenance functions.
d. NATIONAL/NATO STOCK NUMBER. Lists NATIONAL/NATO stock number of specified tool or
e. TOOL NUMBER. Lists manufacturer's part number of tool, followed by (5 digit) Federal Supply
Code for Manufacturers in parentheses.
a. REFERENCE CODE. Refers to appropriate item in Section II, Column 6.
b. REMARKS. Provides necessary information to explain items appearing in Section II.