TM 55-4920-384-13&P
B-5. Maintenance Categories and Work Times.
test equipment being compared with the certified
standard.
The maintenance categories (levels) AVUM,
AVIM, and DEPOT are listed on the Maintenance
g. Install To set up for use in an operational en-
vironment such as an emplacement, site or vehicle.
Allocation Chart with individual columns that in-
dicate the work times for maintenance functions at
h. Replace. To replace unserviceable items with
each maintenance level, Work time presentations
serviceable assemblies, subassemblies or parts.
such as 0.1 indicate the average time it requires a
i. Repair. To restore an item to serviceable con-
maintenance l e v e l to perform a specified
dition through correction of a specific failure or
maintenance function. If a work time has not been
unserviceable condition. This includes, but is not
established, the columnar presentation shall in-
limited to, inspection, cleaning, preserving, ad-
dicate "--". Maintenance levels higher than the
justing, replacing, welding, riveting, and
level of maintenance indicated are authorized to
strengthening.
perform the indicated function.
j. Overhaul. To restore an item to a completely
B-6. Tools and Test Equipment (Section III).
serviceable condition as prescribed by
maintenance serviceability standards and publish-
Common tool sets (not individual tools), special
ed for the specific item to be overhauled.
tools, test and support equipment required to per-
form maintenance functions are listed
k. Rebuild. To restore an item to a standard as
alphabetically with a reference number to permit
nearly as possible to the original or new condition
cross-referencing to column 5 in the MAC. In ad-
in appearance, performance, and life expectancy.
dition, the maintenance category authorized to use
This is accomplished through the maintenance
the device is listed along with the item National
technique of complete disassembly of the item, in-
Stock Number (NSN) and, if applicable, the tool
spection of all parts or components, repair or
number to aid in identifying the tool/device.
replacement of worn or unserviceable elements
(items) using original manufacturing tolerances
and specifications, and subsequent reassembly of
the item.
B-4. Functional Groups.
Standard functional groupings are not con-
sidered feasible for aviation ground support equip-
ment due to variation and complexity. Therefore,
variations to functional groupings may occur.
B-3
