What was found
FO SPEED AND ALTIMETER BLANK FO 10 SEC. CLIMB CRUISE AND DESCEN T RETRIEVED LST FLT LEG FAULT. FOUND MULTIPLE FAULTS RELATED TO NR 2 ADIRU. PERFORMED ADIRS BITE PER FIM 34-21/801 AND FOUND NO CURRENT FAULT CODES. CHECKED ADIRS LAST FLT FAULTS AND FOUND CODES 34-21007,3421023. PERFOMED FIM TASK 34-21/814 AND 34-21/840. UNABLE TO DUPLICATE ANY FAUTLS. DUE TO NUMEROUS NR 2 ADIRU FAUTLS SUSPECT NR 2 ADIRU WILL NEED TO BE CHANGED. ALSO PERFORMED AOA SYSTEM TEST PER AMM 34-21-05 WITH NO FAULTS NOTED AND ALL PARAMETERS WITHIN LIMITS. REF L/P 7075345 FOR ADDITIONAL ADIRU 2 FAUTLS ON SMYD #2. PER PREVIOUYS T/S, R&R #2 ADIRU CHANGED IAW AMM 34-21-01-000/400-801. PERFORMED AIR DATA INERTIAL REFERENCE SYSTEM TEST, OPERATIONAL TEST IAW AMM 34-21-00-710-801. OPS CHECK GOOD, NO FAULTS NOTED AT THIS TIME.