This Japan Airlines Boeing Dreamliner had to abort takeoff from Boston on Tuesday after the pilot of another plane spotted a fuel leak.
NEW YORK (CNNMoney)
Transportation Secretary Ray LaHood, Federal Aviation Administrator Michael Huerta and Ray Conner, the head of Boeing (BA, Fortune 500)'s commercial airplanes unit, appeared at a joint news conference in Washington on Friday to discuss the plans for the investigation.
"We are confident about the safety of this aircraft, but we're concerned about these incidents," said Huerta at the news conference. He said the probe would focus on the aircraft's electrical components and how the electrical system interacts with mechanical components.
Conner said Boeing is also convinced about the aircraft's safety, and that the airlines that have bought the plane are also confident in its safety.
"These planes are safe," he said. "We welcome any opportunity to further assure people outside the industry."
The latest problems were revealed Friday, when oil was discovered leaking from a generator of an engine of an All Nippon Airways Dreamliner at an airport in southern Japan, and a crack appeared in a cockpit window of another All Nippon plane en route from Tokyo to a city in western Japan, according to an All Nippon spokesperson.
This caps a week of problems that began Monday when a maintenance worker discovered an electrical fire aboard an empty Japan Airlines 787 scheduled for departure from Logan International Airport in Boston. The next day, a Japan Airlines flight bound for Tokyo aborted takeoff from Boston after a pilot on another airplane spotted the 787 leaking fuel. On Wednesday, an All Nippon Dreamliner flight was canceled after the crew received an error message related to the plane's braking system.
Related: The Dreamliner's ups and downs
The plane is widely seen as key to Boeing's future, using lightweight composite materials rather than aluminum to significantly improve its fuel efficiency. The first Dreamliner was put into service by All Nippon in October 2011. But even that flight was more than three years behind the aircraft maker's original production schedule.
Shares of Boeing fell 2% in early trading Friday on news of the new problem and the probe.
Carter Leake, an aerospace analyst with BB&T Capital Markets, cut his rating on Boeing stock to a "hold" from a "buy" Friday on news of the probe, even though he believes some of the problems reported this week are normal and relatively minor for a new aircraft.
"Boeing is correct that this is no different from any other airplane," he said. But the attention these problems are getting from the media and regulators are a cause for concern for the company.
"You'd rather not have the FAA rooting around on this," Leake said.
Still, he said the probe could end up being a positive for Boeing in the long run if it gives Boeing and the Dreamliner a clean bill of health.
"If Boeing gets through this fine, they're in a better position," he said.
Leake said part of the problem for Boeing in this probe is that it outsourced more of the manufacturing process for the Dreamliner to suppliers than it has for its other aircraft.
"Boeing doesn't know what it doesn't know," he said.
But Conner said several times during the press conference that Boeing is confident that the outsourcing process is not responsible for any of the recent problems.
-- CNN Wires staff contributed to this story 
First Published: January 11, 2013: 8:04 AM ET
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