At 2137 Eastern time, the airplane sustained minor damage during an emergency landing at the Washington Dulles International Airport. There were no injuries to the three crewmembers or 27 passengers. Visual conditions prevailed. According to the carrier, the flight crew observed a cockpit indication that the right main landing gear had not extended and locked while preparing to land. The flight crew subsequently performed an emergency landing on Runway 19L. During the landing, the right main landing gear collapsed, and the airplane came to rest in a grassy area off the left side of the runway.