What was found
ON APPROACH TO PDX, RECEIVED LVL 2 SLAT DISAG WHEN SELECTING 35 FLAPS. EXECUTED GO-AROUND AND RAN SLAT DISAG CHECKLIST IN QRH. LANDED WITH FLAPS 22/EXTEND. ON CHECK OPERATION OF SLATS PER MAINTENANCE MANUAL 27-84-00-5. SLAT OPERATES NORMAL. FOUND FCC'S FAULTED AND AOA FAULTED. REMOVED AND REPLACED RT AOA SENSOR AND OPS CHECK PER MAINTENANCE MANUAL 22-00-05-5. REMOVED AND REPLACED NR 1 FCC AND PERFORMED RTS AND AFS TEST PER MAINTENANCE MANUAL 22-00-00-5. TEST PASS.