What was found
DURING CLIMB THROUGH 13,200 CABIN PRESSURIZATION ISSUE / DECLARED EMERGENCY NOTICED CABIN ALT WAS 9700 AND INCREASED TO 10,000. PERFORMED QRH AND DECEND TO 10,00 ,CABIN WENT TO 9,800 A FURTHER DECENT TO 8,000 WAS INITATED AND CABIN RETURNED TO 8,200, CABIN WARNING DID GO OFF BREAFLY AT 10,000, AFTER AIRCRAFT STABILIZED AT 8,000.-C/A-AS PER WRITEUP AND CONVERSATION WITH CAPTIN CONTROLLER KNOB WAS NOT IN CORRECT POSITION AS PER AMM 21-31-00, AFTER CREW RETURNED KNOB TO CORRECT POSITION PRESSURIZATION RETURNED TO NORMAL, NO DISCREPANCY NOTED.