Commercial Pilot License (CPL) 2025 – 400 Free Practice Questions to Pass the Exam

The presence of an external power source receptacle is an important feature in many aircraft, allowing ground crews to provide power to the aircraft systems without using the onboard batteries. The correct answer indicates that this receptacle is situated behind a door on the left side of the fuselage.

This location is practical because it is typically accessible from the ground, making it easy for ground personnel to connect or disconnect the external power while the aircraft is parked. Placing the receptacle on the fuselage rather than in an enclosed area like the cockpit or baggage compartment helps ensure that it is protected from the elements and reduces the risk of accidental disconnection during operations.

Understanding the layout of the aircraft's systems, including where external power connections are located, is essential for efficient ground handling and maintaining electrical system integrity. This knowledge is particularly important for commercial pilots as they often engage with ground crews and need to ensure that all components are functioning properly before flight.