France’s BEA aviation investigators said Lubitz, the 27-year-old co-pilot, “used the automatic pilot to put the airplane on a descent towards altitude of 100 feet,” France24 reports.

“Then several times the pilot modified the automatic pilot settings to increase the speed of the airplane as it descended,” it added.

Information from the first black box, which captured conversations in the cockpit, had already confirmed that Lubitz had locked out his pilot, who could be heard shouting and banging on the cockpit door as the plane headed toward the mountains for almost 10 minutes.