What is the next step after disconnecting external power?

Starting the engines is the appropriate next step after disconnecting external power because at this stage, the aircraft needs to become self-sufficient for its operations. Once external power is disconnected, the aircraft’s batteries are used to power necessary systems, and it’s crucial to ensure the engines are started to provide thrust and additional electrical generation.

This sequence is important for operational safety and efficiency. After ensuring that all systems are properly supported by the onboard resources, starting the engines allows for a transition into the next phases of ground operations or taxiing without relying on external sources.

While installing chocks, checking fuel levels, or turning off navigation lights are all essential procedures in ground handling, they typically occur in a sequence where starting the engines would follow disconnecting external power. This ensures the aircraft is grounded and secured with chocks before operating systems that could lead to movement.