NEW YORK [US], A Boeing 737-800 plane operated by Southwest Airlines that was headed to Houston returned safely to Denver International Airport on Sunday after an engine cover fell off and hit the plane's wing flap, CNN reported. Citing the Federal Aviation Administration. (FAA) The FAA said it would investigate the matter. I recorded air traffic control audio, with one of the pilots saying that "several passengers and flight attendants heard something loud hitting the wing." In a statement to CNN, Southwest said passengers are now on another flight to Houston and will be approximately three hours behind schedule. "We apologize for the inconvenience caused by the delay and make the safety of our customers and employees our top priority," the statement said. CNN reported further adding that no injuries were reported. In a statement, Southwest said its maintenance teams would review the flight which departed at 7:49 a.m. (local time) and returned at 8:15 a.m. (local time). Altitude of about 10,000 feet. According to FAA records the plane was deemed fit for flight in May 2015, CNN reports This is the latest incident of mechanical problems encountered by Boeing aircraft at various airlines in the past several months, while the company has Has been facing investigation for years. Security of its aircraft.