After both engine have been started, the APU voltage and frequency information continue to display on the ECAM ELEC page until _________________.

After both engine have been started, the APU voltage and frequency information continue to display on the ECAM ELEC page until _________________.

• A. The APU is shutdown.
• B. The engines reach idle
• C. External Power is connected
• D. The APU is started

Answer: (A)

The ECAM ELEC page shows the status of all electrical power sources, including the APU, as long as that source is available. After both engines are started, the APU may still be running to provide electrical power, so its voltage and frequency remain displayed. They disappear only when the APU is shut down, because there is no longer an APU electrical source to monitor. External power, engine idle, or other conditions don’t inherently clear that display since the APU could still be online.

The ECAM ELEC page shows the status of all electrical power sources, including the APU, as long as that source is available. After both engines are started, the APU may still be running to provide electrical power, so its voltage and frequency remain displayed. They disappear only when the APU is shut down, because there is no longer an APU electrical source to monitor. External power, engine idle, or other conditions don’t inherently clear that display since the APU could still be online.