New York [US], April 8 (ANI): A Boeing 737-800 plane operated by Southwest Airlines and headed to Houston returned safely to Denver International Airport on Sunday after an engine cover fell off and struck the wing flap of the aircraft, CNN reported, citing the Federal Aviation Administration (FAA). The FAA said that it would carry out an investigation into the matter. In recorded air traffic control audio, one of the pilots said that “several passengers and flight attendants heard something loud hit the wing.” In a statement to CNN, Southwest said passengers will now take another flight to Ho…