FCO 9XXX-0015, Rev B MCU Spares to be retested to ensure reliability.

This Field Change Order (FCO 9XXX-0015, Revision B) addresses a critical reliability concern with spare Microcontroller Units (MCUs). A recent test revealed a significant failure rate (4 out of 70) among spare MCUs, indicating a need to retest all affected spares to prevent potential system downtime and improve customer satisfaction. The FCO mandates that all listed spare MCUs, identified by specific P-numbers, must undergo comprehensive system retesting and rigorous VMI (Vendor Managed Inventory/Inspection). This order applies only to spare MCUs; those currently installed in systems are not affected. Field implementation requires replacing existing VAX 9XXX MCU spares with units from an appropriate EQ kit and immediately returning the old units to the manufacturer for retesting via expedited transportation, as the success of this FCO is contingent on a timely return cycle.