What was found
ON CLIMBOUT, EN ROUTE, WHEN MLG SELECTED UP, RECEIVED ECAM MESSAGE THAT MLG DOORS WERE NOT CLOSED. RECYCLED MLG & NEW ECAM MESSAGE APPEARED FOR MLG NOT UPLOCKED, LOWERED MLG & RETURNED. MAINT PULLED UP PREFLT REPORT MLG NOT UPLOCKED. FAILURE MESSAGE RT MLG DOOR OPEN PROX SENSOR 34GA TARGET POSITION, & 32GA. MAINT ADJUSTED BOTH 32GA & 34GA PROX SENSORS, R & R RT MLG DOOR ACTUATOR IAW AMM 32-31-35-401, OPS & LEAK CHECK GOOD. VENDORS FUNCTIONAL TEST OF RT MLG DOOR ACTUATOR S/N DH070399 WAS NO FAULT FOUND. VISUAL INSPECTION DID FIND 2 EACH BEARINGS MIGRATED LOOSE, R & R 2 EACH BEARINGS IAW CMM 32-31-35, REV. 12.