What was found
IAS DISAGREE ON T/O ROLL 50 KNOT SPLIT OBSERVED IN FLIGHT REMOVED AND REPLACED CAPT ADM. IAW AMM 34-21-04. PARTS USED: 29-3413-9-0001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1725589 SN OFF 4429 MODULE, AIR DAT OFF 29-3413-9-0001 4429 ON 29-3413-9-0001 5196 FOUND BLOCKAGE ON CAPT''S PITOT. CLEARED BLOCKAGE. WHILE TRYING VERIFY PER AMM 22-11-00. ALL TESTS PASSED, NO FAULTS. ACFT CAT TO PERFORM LK CHK, CAPT''S ADM FAILED. ADM REPLACED AS SAID IN STATUS REMAINS AT FULL CAT CAPABILITY. PREVIOUS UPDATE. PERFORMED OPS AND LK CHK OF CAPT''S PITOT. OPS CHKS NORMAL, INDICATIONS NORMAL, NO LKS NOTED. PERFORMED LAND VERIFY PER AMM 22-11-00. ALL TESTS PASSED, NO FAULTS. ACFT CAT STATUS REMAINS AT FULL CAT CAPABILITY.