What was found
T/O AUTO THROTTLES DROPPED OFF, REENGAGED AFTER T/O, DROPPED AGAIN, L/GEAR INTERLOCK SELECTED SYS 2. NR 1 A/P AND PITCH TRIM TRIPPED OFF. F/O'S PITOT HEAT O/H ON, WHEN A/P REENGAGED. SELECTED NR 2 A/P, O/H LT OUT, BACK ON. TURNED OFF PER ECAM. CAPTS FLT DIRECTOR DISAPPEARED-CYCLE ON/OFF, CAME ON W/N OPS PROPERLY. SPEED PROTECTOR BARS FAULTED. SELECTED CAPTS ADC ON 2 SPEED BARS BACK ON. GOT NR 1 PRESS FAULT ON ECAM. SELECTED 2 RETURN TO PHX. FOUND PROX DET UNIT FAILED AND REVEALED CODES. REPLACED PROX SENSOR 64GB AND PROX DET UNIT PER MM 32-31-71. ALL CK GOOD.