Boeing starts building longer 787 model

Boeing announced on Sunday it has started building its 787-9, a longer version of its 787 Dreamliner, looking to leave the jet's problems behind.

"The newest member of the 787 family began taking shape on schedule May 30 in Everett, Washington, when Boeing started joining large sections of the super-efficient jet," the aircraft giant said in a statement.

The 787-9 can carry 250 to 290 passengers - 40 more than the 787-8, which started operating in September 2011 - across an additional 300 nautical miles (555 kilometres) while using 20 per cent less fuel than airplanes of the same size.

It should be making a first flight within months, and an initial delivery in early 2014 to Air New Zealand.

"From the start, the entire 787-9 team has focused relentlessly on execution so that we fulfil the commitments to our customers," said Mark Jenks, vice president of Boeing Commercial Airplanes' 787 program.

"Integrating the 787-9 into our production system on time is another clear sign that we are well-prepared and well-positioned for the work ahead."

Twenty customers around the world have ordered 355 787-9s, making up 40 per cent of all 787 orders, the company said.

Boeing is keen to show clients that it can keep deliveries on schedule after the Dreamliner came into service more than three years late.

Regulators grounded the 787 after a battery fire on one aircraft parked at a US airport and a smouldering battery on another caused smoke and fumes, forcing an emergency landing.

In April, US officials cleared the plane to fly following alterations to its lithium-ion batteries.

The first Dreamliner resumed flights later that month and since then, more than half of all of the aircraft have been put back into service.

But Japan Airlines found a fault with a modified Dreamliner on Sunday, reports said, a day after it resumed full operation of the 787 fleet.

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Making up 40% of all B787 orders, it will probably be the main variant of B787 to be ordered in future, just like the B777-300ER. Such is its range and capacity plus the added advantage of fuel efficiency, it will even replace the jumbos in the skies, namely A380 and B747-8I. Will the days of 4-engined planes ever cease to exist in the passenger jet scene?