What was found
FLT#193, BOS-DEN. AIRCRAFT DECLARED AN EMERGENCY AND PERFORMED AN AIR TURN BACK TO BOS. ANTI ICE STBY PITOT ON ECAM DURING FLIGHT; THIS DEFECT IS CORRELATED WITH DEFECT 3546754, ITEM 2 (L/G SYS DISAGREE ON ECAM AFTER LANDING). CLEARING OF DEFECT 3546754, ITEM 2 (PERFORMED FIM TASK 32-31-00-810-815-A. ALL TESTS PASSED UP TO PARA 4A 10. FAULT LEG STORED IN GROUND SCAN OF LGICU 2. PERFORMED FIM TASK 32-31-00-810-850-A. HAD FAULT CODE H138 UNDER TROUBLESHOOTING ON LGICU 2. AS PRECAUTIONARY REMOVED AND REPLACED LGICU 2 IAW AMM 32-31-71. OPS CHECK GOOD AT THIS TIME.