Then,during a test of the wings, the plane moved sharply off its flight path.

VOA: special.2010.07.07

They wanted a plane that could test conditions for future flights into space.

VOA: special.2010.07.07

Earlier on Sunday it was reported the Dutch airline KLM had flown through the ash cloud without the test plane being damaged.

BBC: Flight ban 'not over-reacting' say Wiltshire scientists

Washington (CNN) -- After three weeks on the ground, Boeing's 787 Dreamliner soon will return to the skies -- but only so engineers can test the plane's troubled electrical and battery systems, the Federal Aviation Administration said Thursday.

CNN: Boeing can conduct Dreamliner test flights

Currently, airlines complain that they have to test each model of device individually, on every single plane in the fleet, and with a separate empty flight used for each test, before they're allowed to relax the rules for that model.

ENGADGET: FAA to take 'fresh look' at gadget restrictions on flights