1a processor: Maintenance software

Comprehensive maintenance software is required to meet the system reliability objective of less than an average of 2 minutes per year of outage from all causes. The function and interrelationship of the four basic maintenance programs (fault recognition and recovery, diagnosis, trouble location, and error analysis) are detailed here. Results of extensive laboratory testing and early field experience indicate that the maintenance objectives will be achieved despite the size and complexity of the 1A Processor.