Lifeguard passengers aboard United Airlines flight film through the window while the entire engine shakes violently in flight
- The incident occurred Sunday during the United flight from Denver to Orlando
- The engine attached to the left wing of the aircraft began to shake violently mid-flight  Plane returned to Denver, where passengers were put on other aircraft
Scary mobile phone video filmed by a passenger aboard a United Airlines flight Sunday shows one of the aircraft's engines shaking violently in the air.
The incident occurred during United Airlines flight 293 from Denver to Orlando on Sunday.
A passenger noticed that part of the engine attached to the left side of the aircraft was starting to bounce up and down.
The images above show an engine shaking violently under United Airlines aircraft flight 293 from Denver to Orlando Sunday
The company confirmed that the plane returned to Denver, where passengers departed and then boarded another aircraft.
United flights 293 from Denver to Orlando returned to the airport due to a mechanical problem with one of the engines, "the company said.
There were no injuries.