What does the GND CTL pb do when ON and Auto?
ON - in blue, Manually selects the DFDR and the Cockpit Voice Recorder (CVR) to ON when the aircraft is on the ground. The DFDR is energized.
Auto - follows the lights out philosophy of Airbus. Remains on.
What does the CVR Erase pb do?
If pressed for more than 2 seconds, erases the recording under to conditions:
What is the CVR test pb?
If pressed and held, activates the CVR test if: