Seattle, Washington (CNN) - Boeing conducted another test flight today (Monday) on its troubled 787 Dreamliner planes.
The company said the first test flight - on Saturday - was "uneventful."
That's exactly what they wanted.
The Dreamliner fleet has been grounded worldwide since January 16th after batteries in two planes overheated or burned.
Federal investigators say it could be weeks before the cause of the problem is resolved and the jets cleared for take-off.