How is autothrust arming confirmed on the FMA?

The confirmation of autothrust arming on the Flight Mode Annunciator (FMA) is indicated when "A/THR" appears in blue within Column 5. This blue display signifies that the autothrust system is armed and ready for use, signaling that the aircraft's thrust management can be automatically controlled based on the selected mode. Additionally, the illumination of the A/THR button on the Flight Control Unit (FCU) reinforces that the autothrust system is indeed engaged and functioning properly.

This combination of visual cues—blue text on the FMA and a lit button—ensures pilots have clear, direct feedback about the status of the autothrust system. Understanding this process is essential for ensuring safe and efficient operation of the aircraft, as reliable thrust management is critical during various phases of flight.