What was found
(CAN) IN CRUISE AT FL 390, NOTICED A CHANGE IN CABIN PRESSURE, AND ECAM CRUISE PAGE INDICATEDCABIN V/S RATE OF +700FPM. THERE WERE NO ECAM WARNINGS OR ADVISERIES.INITIAL ACTIONS AS RECOMMENDED BY AIRBUS OEB 139/1 (FCOM 3.07) CARRIED OUT, I.E.