What was found
AT FL 340, NOTICED EARS POPPING. LOOKED AT THE CABIN ALTITUDE INDICATOR & IT INDICATED NORMAL, THE RATE GAUGE FLUCTUATED. AFTER A FEW MINUTES, THE RIGHT PACK INDICATED INOPERATIVE. DESCENDED TO 9000 FT. REMOVED AND REPLACED THE RIGHT PACK TEMP CONTROLLER, AND THE RIGHT FLOW CONTROL CARD AS A PRECAUTION IAW AMM 21-51-14-4, AND 21-51-09-4, OPS CHECKED NORMAL.