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There have been reports from Boeing's manufacturer in Japan that 42 new 787 Dreamliner jets have hairline cracks on their wings. On Thursday United Airlines opened up a wide body airplane maintenance hangar at Newark Liberty Airport, that can handle all the planes in the United fleet including the Boeing 787 Dreamliner and the Airbus A350-XWB.

(Ed Murray/The Star-Ledger)

Boeing's 787 Dreamliner, which the company flew into Newark International Airport during the plane's world tour in 2012, has run into more problems.

Hairline fractures have appeared on the wings of at least 42 recently built jets, reports say.

A spokesman for the company said the planes with damaged wings, which haven't yet been delivered from the manufacturer to buyers, will take between one and two weeks to fix. Seventeen of the 42 planes have already been fixed, the spokesman said, and will undergo tests before they're delivered.

Mitsubishi Heavy Industries, Mitsubishi's Heavy Industries, brought the problem to Boeing's attention and blamed a "change in the manufacturing process."

In December 2012, just months after the plane made its debut, a flight bound for Newark airport had to make an emergency landing in New Orleans because of a filed generator. Then in January 2013 the company battled a public relations nightmare when reports broke that batteries on the planes were catching fire and a Japanese official released this photo of a 787 battery from a plane that made an emergency landing.

Despite problems in late 2012 and early 2013, the company reported better than expected earnings last August.

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