Boeing suspends deliveries of its new 787 Dreamliner

Boeing has suspended deliveries of its new 787 Dreamliner aircraft until a battery problem is resolved.

The US aerospace giant said it would continue to build the plane, but not deliver any until US safety officials gave their backing. The US Federal Aviation Administration and Boeing are investigating the problem.

US and Japanese authorities have begun a joint investigation into GS Yuasa, the Japanese battery maker for Boeing's troubled 787 Dreamliner aircraft. It comes after an All Nippon Airways (ANA) 787 had to make an emergency landing due to a battery malfunction.

However, another US regulator said on Sunday the battery did not overcharge in a separate incident involving a Japan Airlines (JAL)-operated 787.

All 50 of Boeing's 787s have been suspended from flying since an All Nippon Airways flight on Wednesday made an emergency landing due to a fault.

A string of issues in recent weeks has raised questions about the 787, which is the first major aircraft grounding since 1979.

Dreamliners have suffered incidents including fuel leaks, a cracked cockpit window, brake problems and an electrical fire. However, it is the battery problems that have caused the most concern.

Japanese battery maker GS Yuasa has seen its shares fall 11% since 7 January when an electrical fire broke out on a JAL 787 at Logan International Airport in Boston, although they rebounded 1% on Monday as it became apparent the fault may not have been a pure battery problem.

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