0-1 Odd | INDICATING/RECORDING Systems

Question 1

Why is the GND CTL pushbutton selected to ON during preflight?

Answer 1

To record preflight activities in the cockpit.

Question 2

If the pushbutton was not selected ON, how would the system work in automatic mode?

RCDR Panel

Answer 2

• On the ground during the first 5 minutes after the aircraft electrical network is energized.
• On the ground after the first engine start.
• In flight (whether the engines are running or not).
• On the ground, it is stopped automatically 5 minutes after the last engine shutdown provided the CVR jack is not used.

Question 3

What allows the cabin PAs to be recorded?

Answer 3

ACP 3 PA volume knob out and set at or above the medium range.