What was found
DURING DESCENT THROUGH APPROX FL 340 AN ADVISORY APPEARED ON ECAM IF CABIN ALTITUDE PASSING 8800 FT WE RECOVER MOMENTARILY IN MANUAL MODE LEAVING THE CABIN AT 6.200 WITH THE STATUS TARGET WE TRIED TO RECOVER THE AUTOMATIC CONTROLS PASSING FROM SYS 1 TO MANUAL THEN TO SYS 2 BUT ANY OF THE AUTOMATIC SYS COULD RECOVER & THE PRESSURIZATION WAS MANAGE MANUAL. IAW AMM 21-31-00-710-002 OPERATIONAL TESTS OF THE PRESSURE CONTROL & MONITORING WAS PERFORMED. TESTED OK & AMM 21-31-00-710- OPERATIONAL TEST OF THE MANUAL MODE WAS PERFORMED TESTED SATISFACTORY. IAW AMM 21-31-34-000-001 AMM 21-31-34 400-001 THE CPC 1 & CPC 2 WERE R & R. TESTED SATISFACTORY IAW AMM 21-31-00-710-002. TEST OF CABIN PRESSURE CONTROLLER PN 20791-02A SN OFF 0831738 SN ON 0790534 SN OFF 0584856 SN ON 0584856.