What should be done if the MDA is captured during a LOC approach?

Capturing the Minimum Descent Altitude (MDA) during a Localizer (LOC) approach requires specific actions to ensure safe and effective navigation and control of the aircraft. The correct action is to press the MAA (Minimum Altitude Alert) button, assuming that this button or equivalent function is part of the aircraft's systems. This action serves to alert the pilot that the aircraft has reached the MDA, which is crucial for managing the approach and landing phase safely.

Pressing the MAA generally prompts the autopilot or the aircraft's systems to indicate that the lower limit of the approach has been reached. This is a critical moment as it often defines the transition from the descent phase of the approach to either continuing to the runway if visual references are established or executing a go-around if the runway is not in sight. By acknowledging the MDA through this button, the crew ensures that they are operating within the defined parameters and increases situational awareness.

The significance of MDA in an approach lies in its role as a decision point for pilots, where they must evaluate visibility and other conditions to proceed safely. Other methods such as maintaining speed, switching modes, or changing to manual flying, while they may have their own place in handling different flight circumstances