The 787 Dreamliner program gave Boeing Co. (NYSE: BA) another black eye. One of the planes, operated by United Continental Holdings Inc. (NYSE: UAL) was forced to land because of a brake light. The aircraft was flying from Chicago to Denver, but the light made the pilot return to the Midwest airport.

The 787 has already been grounded once, due to battery overheating problems. And a 787 was forced to land in Seattle last week because of another problem, which appeared to come from another part of the electric system. Several such problems could certainly take the plane out of commission again.

CNN said of the most recent diversion of a 787 Dreamliner due to a mechanical problem:

A United Airlines 787 Dreamliner was diverted early Sunday due to a mechanical problem, the second such incident for the plane in a week.

United flight 94 was on its way to Denver when it was forced to fly back to the place from where it left: Houston, 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.

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