APPENDIX D DEFINITIONS

SB 740-91-01

APPENDIX D

DEFINITIONS

Terms used in this supply bulletin may also be further defined in AR 310-25. In some instances, the definitions of key

terms have been extracted from Army regulations for the convenience of the reader.

Acceptable Quality Level (AQL). The acceptable quality level is the maximum percent defective (or the maximum number

of defects per hundred units) that, for purposes of sampling inspection, can be considered satisfactory.

Acquisition Advice (AAC). A one-position alphabetic code which indicates, to the requisitioner, how (as distinguished from

where) and under what restrictions, an item will be acquired. The AAC reflects application of the three basic methods; i.e.,

by requisition, by fabrication or assembly, or by local purchase. The AAC is used for customer level (not wholesale system

level) acquisition (Item Data Segment). See table D-1 for definition of all acquisition advice codes.

Assembly. A group of two or more physically connected or related parts which is capable of disassembly (carburetor,

power pack, IF circuit, amplifier).

Army Master Data File. The files required to record, maintain, and distribute supply management data between and from

Army commands to requiring activities.

Class. A group of items which share the same 4-digit prefix in their Federal Stock Numbers.

Classification. The determination and assignment of the appropriate condition code to material (AR 725-50, appendix II-

33), based upon inspection results.

Component. An assembly or any combination of parts, subassemblies, and assemblies which are mounted together in

manufacture, assembly, maintenance, or rebuild, and which are not normally subjected to disassembly without destruction.

Condition Code. A one-position, alphabetic character used to classify material to identify the degree of serviceability,

condition, and completeness in terms of readiness for issue and use or to identify actions under way to change the status

of material. See table D-2 for definition of all condition codes.

Corrosion. The act or process of wearing away by chemical action.

Critical Functioning Parts. Items having critical functioning parts are those items whose failure would jeopardize the

mission or the safety of personnel. Typical items are engines, transmissions, gear boxes, blades, propellers, control

tubes, instruments in aircraft, instruments and ground support equipment used to check the reliability of aircraft systems,

servo cylinders, quill assembly, drive shaft, stabilizer bar, rotor hubs, scissors and sleeve assembly, pumps, railway cars,

air conditioners, boats.

Critical Performance Characteristics. Items having critical performance characteristics are those items which have high

probability of deterioration during storage because of the nature of the materials from which they are made. Typical

D-1