There were reports of a vibration coming from the aircraft.
The dangerous incident's cause is closer to being confirmed.
The airline has just announced the largest green fuel deal in its history.
The alleged risks could become catastrophic as the airplanes age.
The Southwest Flight 3695 returned safely to Denver International Airport.
It comes as the industry desperately looks for ways to reduce carbon emissions.
Police were unable to catch the flying objects.
The main attraction is a World War II Mosquito that's been grounded for 70 years.
The Yanks are heading to Central Otago for the Warbirds Over Wānaka International Airshow this Easter.