The McDonnell Douglas MD-90 is a twin-engine, short to medium-range commercial airliner that was first introduced in 1995. It is a derivative of the McDonnell Douglas MD-80 series, which was the most popular short to medium-range airliner of its time. McDonnell Douglas decided to manufacture the MD-90 in response to the increased demand for short-haul flights and to compete with the new Boeing 737-300. The MD-90 was designed to be more fuel-efficient and to offer more passenger comfort than the MD-80.

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The MD-90 is a popular aircraft with many airlines, with over 300 units delivered since 1995. It is most commonly used for short-haul flights, as it has a range of up to 2,400 nautical miles. It can carry up to 180 passengers and is powered by two Pratt & Whitney PW4000 engines.

Over the years, the MD-90 has faced some safety issues. In 2003, a FedEx MD-90 was involved in a crash in Tokyo, Japan. The investigation found that the crash was caused by a faulty thrust reverser, which led to a failed takeoff. In addition, some MD-90s have experienced engine fires due to a faulty fuel pipe.

Despite these issues, the MD-90 has been praised for its innovations. The aircraft incorporates many of the latest technologies, such as fly-by-wire flight controls, Enhanced Ground Proximity Warning System, and an advanced autopilot system. These systems make the aircraft safer and easier to fly. In addition, the MD-90 has a high level of passenger comfort and is considered to be one of the quietest aircraft in its class.

The MD-90 is a great example of how McDonnell Douglas has continued to innovate and develop new technologies to make its aircraft safer and more efficient. It is a popular aircraft that has been used by many airlines over the years, and it has proven to be a reliable and safe aircraft. Its combination of advanced technologies and passenger comfort make it a great choice for short-haul flights.