Aircraft Battery Voltage Procedures

What is the required action if the battery voltage is at or below 25.5 V?

If the battery voltage is above 25.5 V, you do not need to check BAT 1, BAT 2, and APU battery switches.

What is the minimum battery voltage that indicates a risk of APU start aborting?

If the AVAIL light is on, check the ______ power button.

What happens after 5 minutes if the aircraft is supplied only by batteries?

Match the following components with their functions:

It is possible to use EXT PWR B and APU GEN simultaneously.

What should be checked after a charging cycle of the battery?

Battery Voltage Procedures

If battery voltage is 25.5 V or lower, a 20-minute charging cycle is needed.
Check ELEC DC SD page, ensuring battery contactors are closed and charging.
After 20 minutes, check battery voltage for BAT 1, BAT 2, and APU BAT.
If voltage is above 25.5 V, the selector should remain on the APU position.

Aircraft Supplied by Batteries Only

If the aircraft is only supplied by batteries, after 5 minutes, the ground horn will trigger.
The ventilation EXTRACT FAULT light and ECAM warning will also activate.

Aircraft Electric Supply During Last 6 Hours

If the aircraft has been supplied electrically for 6 hours, check BAT 1, BAT 2, and APU BAT voltages.

APU Start on Battery Only

If starting APU on battery only, check BAT 1, BAT 2, and APU BAT voltage.
If one battery voltage is below 23.5 V, there is a risk of APU start abort.

AVAIL Light Is On

If the AVAIL light is on, ground personnel should connect EXT PWR A.
EXT PWR B does not permit supplying GND/FLT buses directly without energizing the total aircraft network.
Simultaneous use of EXT PWR B and APU GEN is not allowed.
If AVAIL does not activate or goes off during EXT PWR operation, the GPCU trips.

This quiz covers essential procedures related to aircraft battery voltage management, including guidelines for charging cycles and equipment requirements under various scenarios. It aims to ensure safety and efficiency when operating aircraft powered solely by batteries. Test your knowledge on APU starts and battery voltage checks critical for aircraft operations.