Boeing plans stretch version of 787

SEATTLE — Boeing Co. has committed to building a longer version of its fuel-efficient 787 jet to meet demand from several airlines, the head of the new airplane program said Monday.

“It’s not a matter of if, it’s a matter of when, and finalizing some details around configuration,” Mike Bair, vice president and general manager of the 787 program, said in a conference call with reporters.

The 787-10 will carry approximately 300 passengers, about 50 more than the largest of three models the company had previously said it would build.

While some details have yet to be completed, such as the precise seating capacity and how far the plane will fly, Bair said Boeing expects to begin delivering it in the final quarter of 2012.

Bair said “about a dozen” carriers have expressed interest in a stretch 787, but the only one he mentioned by name was Emirates Airlines, a growing carrier based in the United Arab Emirates.

Initially, Boeing had resisted the call for a larger 787, fearing it might steal sales from an extended-range version of its 777. Then more airlines started clamoring for it.

“Early on, Emirates was pretty much a lone wolf in their interest in the airplane,” Bair said, “but as time has marched on, and we’ve talked to other carriers, it’s become pretty clear that the interest is more widespread than just Emirates.”

Qantas Airways Ltd. of Australia has also said it would be interested in a larger 787 if Boeing built it.

To date, Boeing has received 298 firm orders and 88 commitments from a total of 28 airlines for 787 models.