What was found
SGF - FLT 3560 - DURING CLIMB, WITH AUTO PRESSURIZATION SELECTED CABIN WENT TO 15,000 CAUSING ALL OXYGEN MASKS TO DEPLOY. AIRCRAFT DESCENDED TO 10,000 AND USED MANUAL PRESSURIZATION. MAINTENANCE REMOVED AND REPLACED CABIN PRESSURE AQUISTION MODULE IAW EMB 145 AMM 21-32-01. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)