What was found
DURING CLIMB RECEIVED FO PITOT HEAT FAULT. COMPLIED WITH ECAM. ENTERED ICING CONDITIONS. RECEIVED NI MODE 1 AND MODE 2 FAULT. UNRELIABLE AIRSPEED. DETERMINED DURING LEVEL FLIGHT THAT IT WAS ON THE FO S SIDE. DESCENDED TO GET OUT OF THE ICING CONDITIONS. LOST AUTOPILOTS, ATS AND YAW DAMPENER #2. WAS ABLE TO RECOVER AUTOPILOT #1 AND YAW DAMPER. ATS DID NOT RESET. C/W PROBE ICE PROTECTION ADJ/TEST CAPT. STBY PROBES HEAT AS REQUIRED WHILE F/O PROBE BARLEY WARM CHECKED PROBE CONNECTOR PLUG I.5 FULL TURN INSPECT FOR DAMAGE REINSTALLED PLUG AS REQUIRED OPS CHECK WAS GOOD. AS PER BITE TEST FOR 54GB HAD A FAULT CODE OF 01/28 . BAD BOX REMOVED AND REPLACED PROXIMITY ELECTRONIC UNIT AND BITE TESTED. ALL SYSTEMS NO FAULTS IAW AMM.