Warning tones generated by the audio management unit (AMU) are routed to the helmet audio connections.

• A. Helmet audio connections
• B. Main annunciator panel
• C. VHF radio
• D. Cockpit speaker

Answer: (A)

The main idea is that warning tones must reach the pilot directly and clearly enough to prompt immediate action, even in a loud cockpit. Routing these tones to the helmet audio connections achieves this by delivering the alert straight to the pilot’s headset, providing strong audibility and isolation from ambient cabin noise. This personal, priority delivery ensures the warning isn’t obscured or confused with other cockpit sounds and allows the pilot to hear the alert even if other speakers or systems are active.

The other destinations wouldn’t serve that purpose as effectively. A visual warning on the main annunciator panel conveys information visually but doesn’t ensure the pilot hears a tone immediately. VHF radio audio handles communications, not warning alerts, so it wouldn’t reliably present the tone in a timely, attention-getting way. A cockpit speaker would broadcast to everyone in the cockpit and could be masked by noise or competing sounds, making the warning less immediate and reliable.

So, sending warning tones to the helmet audio connections gives the best chance for the pilot to perceive and respond promptly.