In normal circumstances, where is the air start unit located on the A321?

The air start unit on the A321 is located at the right side front of the aircraft. This positioning allows for efficient access to the unit for maintenance and operational purposes. During normal operations, having the air start unit in this location helps streamline the process of starting the engines. It also ensures that ground crews can effectively engage the unit while adhering to safety protocols.

The right side front location is advantageous because it reduces the risks associated with fuel line access and other critical systems, which are typically located on the left side of the aircraft. This design consideration helps facilitate a more organized workflow during aircraft ground handling and emphasizes safety by minimizing the potential for hazards associated with working near engine components.