MIL-STD-1798 Mechanical Equipment And Subsystems Integrity ProgramThe 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.

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MIL-STD-1798C

overhaul task definitions. (Reference NAVAIR 00-25-403.) The preventive maintenance action should begin with a logic tree decision analysis. The Air Transport Association of America (ATA) Publication MSG-3 outlines procedures to develop preventive maintenance requirements through the use of Reliability-Centered Maintenance Analysis (RCMA) for functional systems.

Once RCMA identifies a preventive maintenance task to be performed, the solution selected will best optimize:

a. Safety, b. Cost,

c. Risk, and

d. Implementation time.

Guidance for how to perform RCMA is provided in NAVAIR 00-25-403 and DoD 4151.22-M. Preventive maintenance actions include:

a. Any act of lubrication or servicing intended to maintain inherent design capabilities:

1. Lubrication: A lubrication task is the application of a lubricant to a component whose design specifies lubrication for proper operation and is appropriate only if the lubricant to be used is a non-permanent type and needs to be reapplied periodically.

2. Servicing: A servicing task entails the replenishment of consumables (e.g., fuel, oxygen, oil, and nitrogen) which are depleted during normal operations.

b. Addition of operational checks to the maintenance procedure to verify that an item is fulfilling its intended purpose.

c. An intensive visual examination of a specific area to detect damage. Visual examinations can be further broken down as follows:

1. Detailed inspection: An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate by the inspector. Inspection aids such as mirrors or magnifying lenses may be used. Surface cleaning and elaborate access procedures may be required.

2. Surveillance inspection: A visual examination of a interior or exterior area, installation, or assembly to detect obvious damage, failures, or irregularity. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.

3. Special detailed inspections: An intensive examination of a specific item(s), installation, or assembly to detect damage, failure, or irregularity. The examination is likely to make extensive use of specialized inspection techniques and/or equipment. Intricate cleaning and substantial access or disassembly procedures may be

required.