MIL-DTL-38769E
APPENDIX A
A.3.8.7 Coding capability. The construction of WUCs provides a capability to designate thirty-three irst
level assemblies (for other than homogeneously grouped items), and thirty-two, third or lowest level
assemblies. If equipment breakout exceeds these capabilities, it will be necessary to continue the listing with
the next available code (note the change in the fourth character of the WUC). For example:
33AA0
- DUAL PUMPING UNIT
33AA8
- Controller
33ABA
- Controller Modulator
33A99
- NOC
A.3.8.8 Homogeneously grouped code construction. Exception to the above WUC construction will be
taken when utilizing homogeneous grouping for peculiar SE. The irst two characters will identify the
homogeneous group, the third character will identify the end item, the fourth character will identify the irst
level of assembly, and the ifth character will identify the lowest level of assembly. For example:
CA000
- HOMOGENOUS GROUP
CAA00
- END ITEM
CAAA0
- FIRST LEVEL OF ASSEMBLY
- LOWEST LEVEL OF ASSEMBLY
CAAAA through
CAAA8
CAA99
- NOC (END ITEM)
A.3.8.9 Multiple items serving a single system/homogeneously grouped end item. Identical components,
within a system/end item performing peculiar functions, will have individual WUC assignments for each
peculiar function/application. For example, a Pressurization Control Unit (PCU) in a system may contain four
identical controllers, but each controller has a different usage (pressure setting) in the PCU. In this case,
each controller will have a unique WUC assigned. Unless otherwise speciied by the acquiring activity, items
installed in multiples, within a functional system/homogeneously grouped end item, that perform within the
same function/application parameters except for location, will have a single code assigned (see 6.2l.). For
instance, only one code will be assigned for items having left and right application, even though they have
different part numbers. The acquiring activity may grant exceptions to this requirement, for items that
have high failure rates, or warrant detailed reporting for analysis purposes. If exceptions are granted, the
nomenclatures of the items will relect part number references to distinguish between the like items. This
will be done on an exception basis, and will not be a common practice.
A.3.8.10 Item serving multiple systems/homogeneous grouped end items. When a single component
functionally services two or more major systems/end items or lower levels of assembly, only one WUC
will appear in only one of the system/homogeneous grouped end item listings. However, the item will
be listed (by identical nomenclature only) in the remaining applicable system(s)/homogeneously grouped
end item(s) with a reference to the previously assigned work unit code, e.g., "Manifold Sequence Valve
(Reference 33FAA)." The WUC column for such items will be left blank.
TABLE I. Systems codes (aircraft)
11
AIRFRAME
12
COCKPIT AND FUSELAGE
13
LANDING GEAR
14
FLIGHT CONTROL
15
HELICOPTER ROTOR SYSTEM
16
ESCAPE CAPSULE
17
AERIAL RECOVER SYSTEM
25
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