Boeing’s Dreamliner has hit another snag.
“Hairline cracks” were found on the wings of some jets still in production, the company said Friday.
Boeing (BA, Fortune 500) was notified by its supplier Mitsubishi Heavy Industries that a change in its manufacturing process may have led to the cracks. Mitsubishi did not immediately return a call for comment.
The wing cracks are only the most recent problem Boeing has faced with its 787Dreamliner, a lightweight wide-body jet that uses composite materials instead of aluminum to be more fuel efficient than other similar planes.
The Dreamliners were grounded by the Federal Aviation Administration in January 2013 due to a fire risk associated with the plane’s batteries. The problem was fixed, but an empty Dreamliner jet caught fire last July at Heathrow’s airport due to a problem with anemergency beacon.
Despite those problems, there is still consumer demand for the jet and Boeing ramped up production throughout last year.