In the ground AUTO mode, the recording system becomes active after which event?

In the ground AUTO mode, the recording system becomes active after which event?

• A. aircraft power is applied
• B. taxiing begins
• C. first engine starts
• D. landing gear down

Answer: (C)

In ground AUTO mode, the data recording system starts recording only after the engines are started. This is because the recording system relies on power and data from the engine-driven electrical sources, which become available once the first engine starts. Turning on the recording system before engine start would capture mostly pre-engine conditions with limited useful data, so activation is tied to the engine start event. Taxiing, landing gear, or simply applying ground power don’t trigger the recording; the engine start is the moment that makes the system go active.

In ground AUTO mode, the data recording system starts recording only after the engines are started. This is because the recording system relies on power and data from the engine-driven electrical sources, which become available once the first engine starts. Turning on the recording system before engine start would capture mostly pre-engine conditions with limited useful data, so activation is tied to the engine start event. Taxiing, landing gear, or simply applying ground power don’t trigger the recording; the engine start is the moment that makes the system go active.