What was found
ATB, RETURNED TO LAX FOR THE SECOND TIME DUE TO THE FOLLOWED ECAM MESSAGES: AUTO FLT AP OFF, - AUTO FLT A/THR OFF, - NAV ADR 2 FAULT ALTI DISCREPANCY, - ALT "X" CHECK, - AIR DATA SWTG AS REQ. F/CTL ALTN LAW. A/C IN ALT LAW. ALL PROTECTION LOST AT 8000' ALT DIFF = CAPT 8000 SBY 3960 F/O 7000. AIR SPEED DIFF CAPT 250 SBY INOP F/O 225. NR 1 + 2 AP - INOP AUTO THRUST - INOP F/O 1+2 - INOP. REPLACED NR 3 PITOT ADM (19FP3). NR 2 AND 3 ADIRU'S, AND ADM(19FP8).