Boeing has reportedly launched the 77X, the world’s longest passenger aircraft, at its wide-body manufacturing facility in Everett, Washington, US.

The company’s latest offering was unveiled at a ‘low key employee-only event’ last week.

Boeing initially planned to host an unveiling ceremony for the newest aircraft. However, the company chose a quiet launch in the wake of the Ethiopian Airlines Boeing 737 MAX 8 plane crash earlier this month that killed all 157 people on board.

“The 777X is expected to be in service next year and set to be the biggest twin-engine airliner.”

The 252ft-long 777X is longer than its predecessor, the 777-300ER, as well as the super-stretched Airbus A340-600 and the 747-8, which holds the record for the longest aircraft, according to CNN Travel.

The 777X is expected to be in service next year and set to be the biggest twin-engine airliner.

Boeing also claims that the 777X is the most efficient twin-engine jet in the world. According to The West Australian, the aircraft will consume 40% less fuel per passenger than the A380 superjumbo.

Several customers have so far placed orders for the aircraft. The list includes British Airways, Cathay Pacific, Emirates, Qatar Airways and Singapore Airlines.

The CNN Travel report stated that Boeing received 358 orders for the 777X.

It is expected to have a seating capacity of up to 425 in two classes, 777X-8 and 777X-9.

While the 777X-8 will have a range of 8,700nm, the 777X-9 will have the ability to cover 7,600nm.

The aircraft features larger windows, a wider cabin, new lighting and enhanced architecture to ensure passenger comfort.