What was found
EN ROUTE, AFTER REACHING CRUISE ALTITUDE RECEIVED ECAM MESSAGE ADR 1 FAULT FOLLOWED BY NR 1 IR FAILURE. APPROXIMATELY 2 HRS 45 MINUTES LATER AUTOPILOT, AUTO THROTTLES, AND FLIGHT DIRECTORS DISCONNECTED AND WOULD NOT RE-ENGAGE, NR 2 IR FAULT INDICATED ON ADIRU STATUS AND CENTRALIZED FAULT DISPLAY SYSTEM. DIVERTED INTO PHX FOR REPAIR. MAINTENANCE REMOVED AND REPLACED THE NR 1 AND NR 2 ADIRU'S IAW T/C R2A34304, OPERATIONAL CHECK WAS GOOD. VENDOR CONFIRMED REASON FOR REMOVAL ON THE NO. 1 ADIRU, SN 3138, FAULT WAS ISOLATED TO SENSOR ELECTRONICS ASSEMBLY AS PRIMARY ROOT CAUSE AND WAS A CONFIRMED FAILURE. GYROS WERE A SECONDARY FAULT ON UNIT. UNIT WAS REPAIRED IAW AT261847-01 CMM TP1011 REV 24.