Boeing has been slammed for comments its executives made at a media briefing on plans to get the grounded 787 Dreamliner flying again, according to Bloomberg Friday.

At the Toyko briefing on March 15th, Boeing officials said their proposed design changes to the Dreamliner's battery systems may allow commercial flights to restart within weeks, pending the Federal Aviation Administration's approval.

The US National Transport Safety Board (NTSB) has accused Boeing of failing to inform investigators about what it intended to say in the briefing.

General Counsel David Tochen wrote a letter saying the comments were "inconsistent with our expectations" from a company involved in an accident probe.

Boeing is under investigation over the 787 Dreamliners that were grounded after its lithium-ion batteries overheated on a Japan Airlines Co. (9201) plane and an All Nippon Airways plane.

Tochen's letter shows strain in the investigation as Boeing works to resume flights and save its image.

"The NTSB's primary concern is that during their March 15th briefing in Tokyo on the modifications to the 787 battery system, Boeing representatives provided their own analysis and conclusions regarding an ongoing NTSB investigation," Kelly Nantel, an safety board spokeswoman, said in a statement.

Boeing spokesman Marc Birtel said the company remains committed to the support of NTSB and other regulatory authorities in their investigations into the cause of the 787 battery incidents.

The company is working around-the-clock to restore the 787 fleet to service, he added.

RD

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