In pitch ELAC 2 will be in command in normal configuration, operating the two inboard servojacks supplied by the green and the yellow hydraulic system. ELAC 1 will be in monitor mode and the two outboard servojacks ( blue hydrau-lic system ) will be in damping mode. In case of fault on ELAC 2 or the servojack, the backup will become active and will maintain full control of the surface. If one servojack looses its electrical sup-ply it will be switched to centering mode. In case of failure on both ELAC l and 2, control of the Elevators are automati-cally switched to SEC 1 or 2 depending of the status.
As stated above if you demand a high load factor through the side stick both actuators become active.