Boeing announced on its social networks the debut date of the 777X, an advanced version of the “triple seven” introduced in the 1990s. The largest twin-engine commercial jet in history will be unveiled on March 13 in Everett, Washington.

The model that will be revealed is the 777-9, the largest capacity and which can carry between 400 and 425 passengers in a two-class cabin. The new jet is capable of flying for 7,600 nautical miles (14,075 km) and has a length of 252 ft (77 meters), the longest of Boeing’s aircraft.

The manufacturer will also launch another smaller model, the 777-8, with 229 ft (70 meters) and capacity to carry between 350 and 375 passengers. The advantage of this variant is to offer an even greater autonomy, of 8,700 nautical miles (16,110 km).

In common, the two 777X are equipped with GE9X engines, the largest turbofans ever created, larger windows, resized cabin, composite wings and the innovative folding wing-tip, tips that stand up when the plane is on the ground.

Boeing already has 358 orders and letters of intent from eight customers, including the recent order from British Airways, which will replace its 747 quad-engines with the new aircraft.

The Boeing 777-9 is expected to enter service in 2020, according to the company.

Boeing has 358 777X orders and commitments (Boeing)