What is the purpose of the DCU?

• A. Data Collector Unit - Collects information for showing on the EICAS
• B. Display Control Unit - Manages main displays
• C. Digital Clock Unit - Provides timers for procedures
• D. Data Communication Unit - Handles ACARS messages

Answer: (A)

The key idea is how engine and system data get to the cockpit displays. The DCU is responsible for gathering measurements from various sensors across the engines and aircraft systems, then preparing and sending that data to the EICAS so it can show accurate engine indications and alerts. In other words, it collects and condenses the information the EICAS needs to display.

That’s why this option fits best: it directly describes gathering the data that will be displayed on EICAS. The other units have different roles—one manages what the displays show, another provides timers for procedures, and another handles ACARS communications—so they aren’t about feeding the EICAS with engine and system data.