Downloaded from https://www.everyspec.com MIL-STD-3001-2A(AS) c. Engine systems principles of operation WPs. d. Schematic diagram WPs. 5.2.5.1 Aircraft weapon system principles of operation work packages popwp >. A separate principles of operation WP shall be developed for each aircraft system (see figure 4 ). All principles of operation WPs may have an introduction intro >. The WP shall contain the functional operation for the system systhry >, its subsystems systhry >, and components systhry >. Detailed physical descriptions of the systems and components may be included here when usability is enhanced (refer to 5.2.4.2.1 ).
When descriptive data is included, it is not necessary to prepare separate description WPs. The descriptive data shall precede the narrative for the principles of operation. When necessary for usability or clarity, subsystem popwp > and component popwp > principles of operation may be provided in separate WPs. Subsystem component principles of operation may be included in either the subsystem principles of operation WP or in a separate component principles of operation WP. Detailed component functional operation, common circuitry, and wiring diagrams shall not be included unless necessary to understand system/subsystem function.
5.2.5.2 Aeronautical equipment, airborne weapons/equipment, and support equipment principles of operation work packages popwp >. Principles of operation WPs shall be developed for aeronautical equipment, airborne weapons/equipment, and support equipment, as applicable. All principles of operation WPs may have an introduction intro >. Detailed physical descriptions of the systems and components may be included here when usability is enhanced (refer to 5.2.4.2.2 ). The descriptive data shall precede the narrative for the principles of operation (see figure 5 ). When descriptive data is included, it is not necessary to prepare separate description WPs.
The principles of operation should consist of a functional narrative written to help understand the equipment operation (electrical/electronic, hydraulic, pneumatic, and mechanical). When necessary, principles of operation may be divided into simplified and detailed principles of operation and contained in separate WPs. 5.2.5.3 Engine systems principles of operation work packages popwp >. A separate WP explaining the operation of the engine and each of its systems shall be prepared. All principles of operation WPs may have an introduction intro >. Detailed physical descriptions of the systems and components may be included here when usability is enhanced (refer to 5.2.4.2.3 ).
The descriptive data shall precede the narrative for the principles of operation. When descriptive data is included, it is not necessary to prepare separate description WPs. Information such as compressor stages, combustion chamber arrangement, and location of major sections, modules, components, and accessories shall be presented. The principles of operation shall consist of a functional narrative written to facilitate understanding of the engine systems to the extent necessary to support fault detection and isolation and maintenance of the systems. This text shall describe system operation and the relationship of other systems/components during system integration.
5.2.5.4 Schematic diagram work packages schemwp >. Schematic diagrams required to support the principles of operation or the testing and troubleshooting of systems, equipment and 11