What was found
IAS DISAGREE MESSAGE SHOWS ON AIRPSEED DISPLAY CAPTAIN'S IAS DISAGREE CAME ON AT TOPOF DESCENTFL370 CHECKLIST RAN FO SIDE RELIABLE CAPT SIDE BAD. REPLACED CAPT AOA SENSOR PER MM 34-21-05-401, OPS CK OK PER MM 34-21-05-501 AND REPLACED CAPT PITOT ADM PER MM 34-21-04-401, OPS CK OK. SWAPPED ADIRUS FOR TROUBLESHOOTING AND RETURNED TO ORIGINAL POSITION PER MM 34-21-01-401, OPS CK OK PER ADD EMP:U138154 MM34-21-00-501. PERFORMED PITOT STATIC LEAK CHECK PER MM 34-11-00-501, TEST OK.