B-3. Explanation of Format.
a. Column 1, Group Number. Column 1 lists group numbers, the purpose of which is to match
components, assemblies, sub-assemblies, and modules with the next higher assembly.
b. Column 2, Functional Group. Column 2 lists the next higher assembly group and the item
names of components, assemblies, subassemblies and modules within the group for which maintenance
c. Column 3, Maintenance Function. Column 3 lists the twelve maintenance functions defined
in B-2 above. Each maintenance function required for an item shall be specified by the symbol among
those listed in d below which indicates the level responsible for the required maintenance. Under this
symbol there shall be listed an appropriate work measurement time value determined as indicated in
d. Use of Symbols. The following symbols shall be used to prescribe work function responsi-
O - Organization
F - Direct Support
H - General Support
D - Depot
The higher level of maintenance has the authority to determine:
(1) If the lower level is capable of performing the work.
(2) If the lower level will require assistance or technical supervision and on-site inspection.
(3) If the authorization will be granted.
e. Work Measurement Time. The active rep air time required to perform the maintenance func-
f. Column 4, Tools and Equipment. This column used to specify, by code, those tools and test
equipment required to preform the designated function.
g. Column 5, Remarks. Self-explanatory.