Story highlights
A United Airlines 787 Dreamliner is forced to fly back to Houston
The cause of the problem: an issue with the brake indicator
On Tuesday, another Dreamliner flight made an unscheduled landing
Spokeswoman: "We know it will continue to receive heightened attention"
A United Airlines 787 Dreamliner was diverted due to a mechanical problem, the third such incident for Dreamliners in six days.
United Flight 94 was on its way to Denver early Sunday when it was forced to fly back to the Houston airport where the flight had originated, United Airlines said.
The cause: an issue with the brake indicator.
The plane landed without incident and with no passenger injuries, said Boeing, which makes the Dreamliner.
On Tuesday, another United Airlines Dreamliner flight made an unscheduled landing.