What was found
AIRCRAFT WAS GROUNDED: IN CRUISE FLIGHT, #2 AIR DATA INERTIAL REFERENCE UNIT (ADIRU) ECAM FAULT. FLIGHT CREW ACCOMPLISHED ECAM ACTIONS AND FIRST OFFICERS #3 AIR DATA INERTIAL REFERENCE UNIT (ADIRU) WAS SELECTED. ALL FIRST OFFICERS INSTRUMENTS BLANKED AUTO PILOT OFF, AUTO THRUST OFF UNABLE TO REINSTATE ANY AIR DATA INERTIAL REFERENCE UNIT (ADIRU) ON FIRST OFFICERS SIDE REGARDLESS OF SWITCH POSITION. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PIT WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED #2 AIR DATA INERTIAL REFERENCE UNIT (AALA202206284284) AND #3 AIR DATA INERTIAL REFERENCE UNIT (AALA202206280681) PER AMM 34-12-34. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.