Yes, an Airbus A320 can fly with one engine. It is designed and certified to operate safely in the event of an engine failure, as per the stringent requirements of ETOPS (Extended-range Twin-engine Operational Performance Standards) and other regulations. Here's how it works:

1. Safety and Certification

• The A320 is a twin-engine aircraft, and its systems are designed with redundancy to handle single-engine operations.

• It can continue flying safely and perform an emergency landing with one engine.

2. Performance with One Engine

• The remaining engine provides sufficient thrust to maintain level flight or descend to a safe altitude.

• Depending on weight, weather, and altitude, the aircraft may not be able to climb, but it can maintain safe flight and proceed to the nearest suitable airport.

3. Automatic Systems

• The aircraft's FADEC (Full Authority Digital Engine Control) system automatically adjusts the operating engine for optimal performance.

• Critical systems, such as hydraulics, electrical power, and cabin pressurization, are supplied by the remaining engine or alternative systems like the RAT (Ram Air Turbine) or the APU.

4. Pilot Procedures

• In case of an engine failure, the pilots follow procedures from the Quick Reference Handbook (QRH) to handle the situation.

• They secure the failed engine, assess the situation, and divert to the nearest suitable airport if needed.

5. Glide Capability

• If both engines fail (a rare scenario), the A320 can glide for a considerable distance. Its glide ratio is approximately 15:1, meaning it can glide 15 nautical miles for every 1,000 feet of altitude.

The A320’s ability to operate on one engine ensures passenger safety and compliance with international aviation standards.