Downloaded from https://www.everyspec.com MIL-STD-3001-2A(AS) 5.2.4.2 Aircraft systems, aeronautical, airborne weapons/equipment, support equipment, and engine description work packages. All descriptive WPs may have an introduction intro >. The following descriptive WPs shall be developed for aircraft systems, aeronautical and airborne weapons/equipment, support equipment, and engines, as applicable: a. Aircraft system, subsystem, and component description WPs. b. Aeronautical equipment, airborne weapons/equipment, and support equipment description WPs. c. Engine and engine system description WPs. d. Programming software description WPs.
5.2.4.2.1 Aircraft system, subsystem, and component description work packages . A separate description WP shall be developed for each aircraft system (see figure 3 ). The WP shall contain descriptive data sysdesc > that includes the purpose, type, content, and main features of the system. Other supportive descriptive data addesc > shall be included when it is necessary to describe additional technical data that may relate to, but not be physically integral to, the system/equipment, such as specific operating software.
When required, a table of leading particulars or technical characteristics shall be included to present the physical and electrical characteristics of the system and the major functional components. Subsystem sysdesc > and component descriptions sysdesc > shall also be included, when applicable. When necessary for usability or clarity, subsystem and component descriptions may be provided in separate WPs. Subsystem component descriptions may be included in either the subsystem description WP descwp > or in a separate component description WP descwp >.
If a system has a relationship to other systems installed in the aircraft, a brief description desc > of these related systems shall also be provided. The purpose, use, and function of all operating controls and auxiliary equipment, or attachments furnished with the system or equipment shall also be included, as applicable (refer to 5.2.4.2.1.1 ). Illustrations shall support the descriptive data. The illustrations shall identify and locate the system, equipment, and components and their associated access panels, if any.
When necessary for usability or clarity, separate description WPs may be used for each aircraft system, subsystem and individual system component, or the descriptive data may be included within the principles of operation WPs (refer to 5.2.5.1 ). 5.2.4.2.1.1 Controls and indicator descriptions. A description and use of controls and indicators shall be prepared for each equipment, assembly, or control panel having controls and indicators. The coverage should also provide interpretation of typical instrument readings (with acceptable limits stated) and indicator presentations to inform the operator what recognizable results to expect to observe during each mode of operation.
Illustrations shall be prepared to locate and identify all operator controls and indicators and related placard data. Each control and indicator shall be clearly labeled as it appears on the equipment. Controls and indicators that are not labeled shall be identified. The functional use of each control and indicator shall be explained. A table shall be used to explain the use of the controls and indicators (see figure 3 , Table 1). When the controls or indicators for a system are situated on 8