What was found
STATUS MESSAGE CABIN ALT AUTO 1 UNABLE TO CLEAR. BITE SHOWING AC MOTOR. ACCMP'D BITE OF NR 1 CABIN PRESSURE CONTROLLER PER MM. FAULT SHOWS "SELECTOR". REPLACED CABIN PRESSURE SELECTOR PANEL M13 PER MM, OPS CKD GOOD. STATUS MSG RETURNED. ITEM HAS SEVERAL HISTORIES WITH AUTO CONTROLLER 1 AND CONTROL PANEL ALREADY REPLACED. RPL CABIN OUTFLOW VLV ACTUATOR. ACT MR21324 = PCN 563-9223. NEED TO HAVE THROAT PRESSURE SENSE LINES CHKD OR HAVE FLOW CONTROL VLV REPLACED PER FIM. LEFT & RIGHT FLOW CONTROL VALVES REPLACED PER AMM. BITE TESTED AUTO CABIN PRESS CONTROLLER SYS AUTO-1 PER A. NOFAULTS.