MIL-STD-1798C
5.5.1.3.3 Execute EWIS Task 1 • Document overall EWIS and identify critical circuit paths and functions.
Execute 5.2.15 if not accomplished.
5.5.1.4 Classify MECSIP components for criticality.
All MECSIP safety- and mission-critical parts shall be classified for criticality, utilizing the procedures in 5.2.9. The outputs from the FMECA, functional hazard analysis, and hazard analysis (HA) shall be utilized per 5.2.9 to identify all safety- and mission-critical MECSIP components. Engineering Service Authority (ESA) approval is required for identification of safety- and mission-critical components. An inspection and/or service life interval shall be imposed for all safety- and mission-critical components when appropriate. All safety-critical components shall be serialized and have their usage tracked. All safety-critical components shall be assigned a life-limit based on the original certification testing. Safety-critical components shall not be allowed to fail in service. The MECSIP Manager shall coordinate with depot and supply sources regarding implementation of serialization and serialized management of parts (newly developed versus newly procured). Specific controls utilized to prevent in- service failures of each safety-critical part shall be identified.
5.5.1.5 Review the aircraft scheduled inspection and maintenance tasks (for USAF
aircraft these are found in the Dash 6 TOs).
The Program Office shall review the technical manuals for all inspection requirements on MECSIP equipment. These technical manuals shall: list all scheduled and special inspections required (ISO, HSC, preflight, hard landings, high winds, hot brakes, etc.); Programmed Depot Requirements, if applicable; Functional Check Flights; Historical Documents (AFTO Form 95 for USAF programs); Replacement Schedule (e.g., time changes); Base-level Repair Restrictions; and Work Cards for ISO, HSC, Preflight, Thru-flight, etc. The Scheduled Inspection section lists all requirements for the ISO, HSC, Preflight, Post-flight, and other inspections. The Special Inspection section lists inspection requirements that will be accomplished upon the accrual of a specified number of flying hours, equipment hours, a lapse of calendar time, or after occurrence of a specified or unusual condition. The Special Inspection section shall be reviewed during the annual Product Improvement Working Group (PIWG) meeting. (NOTE: The MECSIP Manager should attend the annual PIWG meeting for his/her weapon system.) The Historical Documents section lists all items which require an entry into the aircraft forms (AFTO Form 95 for USAF aircraft), and provides a permanent record or history of events and conditions encountered during the use of the equipment. The Replacement Schedule lists items replaced upon the accrual of a specified number of flying hours, equipment hours, or a lapse of calendar time, or after the occurrence of a specific or unusual condition. The Replacement Schedule shall be updated when items are added or deleted during the PIWG meeting. The Base-Level Repair Restrictions section lists items by WUC and Noun for which Base-level (Intermediate Maintenance) repair restrictions are established and describes the repairs that are not authorized at Base-level for the items listed. All other repairs required to return an item to a serviceable condition can be accomplished at Base-level, consistent with resident capabilities.
5.5.1.6 Review WUC Manual.
The WUC Manual shall be reviewed/updated at a frequency not to exceed five years. This manual must be easy to interpret by the technicians and a WUC must exist for each item being monitored. The manual must reflect if a component is to be: serially tracked, is under warranty, has a scheduled time change, or requires special handing. Updating the WUC is the first step in accurate historical database maintenance.
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