MIL-STD-1798C
1. SCOPE
1.1 Purpose.
The purpose of this standard is to describe the general process to achieve and maintain the physical and functional integrity of the mechanical elements of aircraft systems. The goal of this integrity program is to achieve the desired level of safety and aircraft availability at the most economic cost across the life cycle of the weapon system. This standard allows the process to be tailored in a competitive environment to meet specific equipment, subsystem, and/or system requirements. The Mechanical Equipment and Subsystems Integrity Program (MECSIP) is implemented in the planning process and continued until retirement of the system.
The MECSIP applies to both development and non-development items, including those that are commercial off-the-shelf (COTS) items. For development items, the purpose of this process is to establish and sustain a design that meets the service life, mission, usage, and environmental
requirements. For non-development items, the emphasis is on definition of the capabilities of the item when subjected to the intended service life, mission, usage and environments. If shortfalls
are identified in the existing capabilities of a non-development item, the Program then has the necessary information to initiate the appropriate trades relative to the cost of the design change
versus required performance, maintenance actions, total operating cost, impact on mission, etc.
1.2 Use.
This standard cannot be used for contractual purposes until it is tailored with specific supplemental information pertinent to the equipment or system being procured. The information from this standard is intended for inclusion in the Request for Proposal (RFP) and contract Statement of Work (SOW). A SOW will be developed in accordance with procurement guidelines which covers the tailored tasks, subtasks, strategy, plans, and the effort to be accomplished. As the system enters into sustainment phase, the MECSIP Manager should use the contents of this document to continuously refine and optimize the MECSIP established during the development phase to address issues and risks encountered during sustainment.
1.3 Program approach.
The MECSIP is an organized and disciplined engineering and management process to ensure the integrity (e.g., durability, safety, reliability, and supportability) of mechanical systems and equipment is achieved in development and maintained throughout the system's operational service life. The process consists of program-phased tasks which focus on the following:
a. classificatioin of the criticality of MECSIP component parts into categories for: safety critical; mission critical; durability critical; durability non-critical; or expendable and implementation of appropriate controls to prevent failure based on those classifications;
b. application of a disciplined system engineering approach to design and development which emphasizes the determination and understanding of failure modes and consequences on safety and operational performance;
c. comprehension of total system operational and support needs and the development of the resulting mechanical equipment and subsystem requirements;
d. emphasis on realistic integrity requirements such as operational service life, usage, and natural and induced environments (including maintenance and support) as the basis for design, qualification, and airworthiness certification.
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