Where is engine #1 located on the aircraft?

The correct location for engine #1 on an aircraft is the left side. This designation is standard in aviation terminology, where engines are typically numbered based on their side of the aircraft, with engine #1 being on the left side when facing forward from the cockpit. Understanding this designation is crucial for pilots and crew as it affects operational procedures, especially in emergencies or during pre-flight checks.

Oftentimes, operations and safety protocols are designed around the specific locations of each engine, as certain systems are dependent on engine placements. For instance, procedures for engine failure during takeoff specifically reference the positions of the engines to ensure correct actions are taken. Hence, recognizing that engine #1 is always on the left side (from the perspective of someone in the cockpit facing forward) is an important piece of aircraft familiarity.