Boeing has started initial sales efforts on the 777X in advance of an expected launch of the next-generation aircraft.

Boeing said it has begun discussing “technical, pricing and schedule details” with airlines and lessors potentially interested in the 777X. Boeing chairman, president and CEO Jim McNerney said last week the company will target 777X entry into service for the end of this decade, adding that it “wouldn’t be a shock” if the program were launched this year.

Boeing has said the 777X will feature a composite wing and a new engine, with the GE Aviation GE9X already part of the development process. “The timing of a decision to launch the program will depend on market response during this next phase of our discussions about the airplane,” Boeing said.