Flight 3695 took off from Denver on Sunday morning and was headed to Houston.
The aircraft returned safely to Denver after the incident was identified.
The Boeing 737-800 was towed to the gate.
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The aircraft was headed to William P. Hobby Airport in Houston.
The FAA will investigate.
The cowling plays an important role in flight, the outlet stated, reducing drag and increasing speed.
It also allows the engine to cool more efficiently and protects the engines controls.
The Boeing 737-800 in question was manufactured in 2015, according to theFAAs database.
According toThe Washington Post, flight 3695 carried 135 passengers, two lap-held infants, and six crew members.
In an emailed response on Monday, Southwest Airlines told Gizmodo that the plane suffered a mechanical issue.
It added that passengers arrived in Houston on another plane approximately three hours behind schedule.
There were no injuries reported, according to the Post.
We apologized to those Customers for the inconvenience of their delay and our Maintenance teams are reviewing the aircraft.
We place our highest priority on ultimate Safety for our Customers and Employees, Southwest Airlines said.
The investigation is still underway, and we do not have anything additional to add at this time.
The incident led to theresignation of Boeing CEO David Calhounas well as several other Boeing executives.
Boeings been in the news for all the wrong reasons lately.
When reached for comment by Gizmodo on Monday, Boeing directed inquiries to Southwest Airlines.
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