NEW YORK (CNNMoney) -- The mechanical problems continued Wednesday for Boeing's new 787 Dreamliner, an aircraft seen as a key part of the company's future.
In the third incident so far this week, an All Nippon Airways flight in Japan was canceled after the crew discovered an error message related to the 787 Dreamliner's braking system.
On Tuesday, a Japan Airlines 787 flight was canceled in Boston after a fuel leak was discovered as the plane was preparing for departure.
On Monday, a fire broke out on an empty Japan Airlines 787 on the ground in Boston. The fire was traced to batteries used to trigger the auxiliary power unit, which provides electricity while the plane is on the ground. The National Transportation Safety Board is investigating the incident.
The first two incidents helped hammer Boeing's stock price, which ended at $74.13 Tuesday, down 4.6% from the close of trading Friday. But after declining early Wednesday, Boeing shares were slightly higher in premarket trading.
Boeing's 787 Dreamliner is the first commerical jet to be made from light-weight composite material that includes carbon fibers. The Dreamliner made its debut in October 2011 with its first commercial flight, three years behind schedule.
Boeing has delivered 49 Dreamliners so far, with about 800 still on order.
There were also three incidents last year, two of them involving engine failures during ground tests. The most recent 2011 incident happened in December, when pilots for United Airlines, a carrier owned by United Continental Holdings, managed to safely divert a Dreamliner to New Orleans after experiencing mechanical problems.
The Dreamliner had experienced a mechanical problem during a test flight in 2010 from Yuma, Ariz., to Laredo, Texas. A fire caused the airplane to lose electrical power, but the pilots managed to land it safely using backup systems. The 42 people on board evacuated via emergency slides.
- James O'Toole of CNNMoney, Yoko Wakatsuki of CNN and CNN Wires staff contributed to this story.
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