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II. MAINTENANCE INSPECTION PROGRAM DEFINITION

A. Concept

The current plan is to continue with the OMRSD containing the tasks necessary to maintain Orbiter structure and systems. OMRSD content will be revised to reflect the incorporation of the SMSG-1 analysis tasks.

B. Scheduled Maintenance (Primary Cycles Through Check "D")

Scheduled maintenance is controlled by the OMRSD. This control document specifies flight thresholds in terms of flight intervals and/or Orbiter age.

C. On-Condition Maintenance

On-condition maintenance is restricted to components on which a determination of air worthiness may be made by visual inspection, measurements, tests, or other means without a teardown inspection or overhaul.

D. Non-Routine Maintenance

Non-routine maintenance consists of all maintenance that is not scheduled. It consists of all "corrective maintenance" tasks that are developed as a result of inspections, checks, tests, measurements, or flight anomalies. All non-routine maintenance tasks are conducted prior to flight unless there is a need to defer and there is a justification available to support the deferral.

III. MAINTENANCE SUPPORT SYSTEM DESCRIPTION

A. Maintenance Control System (Documentation, Automation)

A process support plan, by flight, is put together as prescribed by the OMRSD. From this plan, work packages are assembled and issued to the different workstations for accomplishment. As the work packages are closed, they are sent to the KSC Quality Data Center where they are entered in data bases for configuration, trend analysis, and record logs for future recall analysis. 

B. Inventory Control System

Rockwell International Corporation (RIC), under contract to NASA/Johnson Space Center (JSC), is responsible for managing Orbiter spares, including establishing and maintaining inventory levels.

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