Where is Engine 1 located on an aircraft?

Engine 1 is typically located under the left wing of an aircraft, which is standard for many commercial jet designs. This positioning serves several purposes, including balancing the aircraft's weight and providing ease of access for maintenance and inspections.

When considering the design of most aircraft, having engines mounted on the wings allows for better aerodynamics and stability during flight. It also means that if an engine failure occurs, the aircraft can continue to fly with more manageable characteristics due to the placement of the remaining engines.

In contrast, the other options represent locations where engines are generally not found in conventional multi-engine aircraft. For instance, engines positioned under the right wing or in the tail are specific arrangements for different aircraft designs, but they aren't the standard for indicating Engine 1 as the left wing location is more universally recognized.