When will the ADG deploy?

The ADG, or Air Driven Generator, is designed to deploy automatically in response to specific loss of power conditions. The correct answer indicates that the ADG will deploy when both AC BUS 1 and AC BUS 2 are unpowered. This scenario is critical because the loss of power to these essential buses indicates a failure in the primary electrical system, and the ADG acts as a backup by providing power to crucial systems, thus ensuring flight control remains operational.

In contrast, deploying the ADG under the other circumstances is not accurate. For instance, exceeding cruising altitude does not inherently relate to the activation of the ADG, as it focuses on electrical availability rather than altitude. Manual overrides by pilots do not trigger the ADG; it is designed to function automatically without manual initiation in the event of power loss. Additionally, while emergency landings can lead to various maneuvers, they do not specifically dictate the conditions under which the ADG deploys, as the ADG's activation is contingent upon the electrical state of the aircraft's busses.