
Boeing studied several concepts known as the 767X in a bid to evolve its commercial aeroplanes division, but none were launched.
The iconic workhorse, which entered the industry more than 40 years ago, continues to fly in the mid-2020s and has had many variants launched, serving as a staple for passenger and freighter flying.
Boeing sought to leverage the success and development of the 767 to bridge the gap to the 747 in the 1980s, and even saw the jet as a possible solution to freighter requirements in the 2020s.
Ultimately, for several reasons, the concepts never launched. But what were they, what would they have offered airlines, and what happened?
Introducing A Possible 767X
The Boeing 767X gained most of its legs through studies aimed at bridging the gap between the existing 767 model and the queen of the skies, the 747.
The 767X was also known throughout the industry as the 767 Hunchback, and in essence came about because of its hunch, but instead of following the theme present with the 747, that hunch was towards the rear of the aircraft.
This concept design took off in the 1980s, when the American planemaker was seeking ways to boost capacity in its commercial aeroplanes division without having to dramatically redesign existing planes or embark on a totally new endeavour, which would also be costly and require significant resources.

During an era when conceptual designs were coming out thick and fast, manufacturers like Boeing were looking to leverage technology development to their advantage and advance the capabilities of airline customers by a factor of 10.
Early concepts for the larger 767X essentially saw an existing section of the Boeing 757 fuselage mounted at the aft of the 767 model, while it was known as the X and held the nickname the Hunchback. It was also known as Mukeileto.
For airlines not seeking to purchase something like the 747, or believing the 737 was too small, maybe even the existing 767 model was not adequate in terms of capacity, Boeing felt the X model was to be an answer to the requirements, with a prospect of seating above 300 passengers, depending on the chosen configuration from the airline.
A Possible New Freighter
The possibility of a new era for the 767 emerged once more in the latter stages of the 2010s, driven by reporting from Flightglobal and others that Boeing was studying a re-engined derivative of the widebody program.
With hopes of seeing the aircraft enter service by the mid-stages of 2020, the widebody model would have primarily been a freighter and therefore serve operators’ requirements for a reliable yet modest option.

Dubbed the 767-XF, the platform for this new freighter was to be based on the -400ER variant and would’ve been powered by GEnx engines. Additionally, an extended landing gear to provide ground clearance would’ve been incorporated.
Boeing knew it held a significant share of the freighter market at this point and believed it could appease customers who operated the 767-300, notably FedEx and UPS, two of the largest freighter providers in the world.
With the hoped-for entry into service date of 2025, these discussions took place at the end of 2019, right before the emergence of the COVID-19 pandemic, and were part of Boeing’s efforts to respond to market requirements and trends.
Additionally, by Boeing re-engining the existing platform, it would see minimal changes to the airframe’s structure, with the planemaker even looking to use the existing forward cargo maindeck door, which was also found on the -300F model.
However, FlightGlobal reporting noted that a prospective 767-XF wouldn’t just benefit freight operators but also Boeing itself, with the possibility that the jet could support financial and resource management, enabling a 737 replacement to be discussed.

During the period in which the re-engine was discussed, Boeing was also in admist its 737 MAX crisis and much of the discussion didn’t just centre around how it was to move forward from this, but how it was going to combat the launch of the A321XLR and its lack of an NMA, known as the 797.
What Ended Up Happening?
Whether it was the 767 huncback, or the late-2010 possibility of a re-engine that would’ve brought new life to the program, neither model was released.
As foreseen in the 1980s conceptual design, this model never launched, and many complexities emerged upon further analysis by Boeing, largely due to powering the jet.

Whether it’s the jet’s feasibility from an efficiency standpoint, engine selection, safety, operating metrics, and more, the 767X remains a concept that never got its legs to launch.
As for the 767XF, studied more recently at the end of the 2010s, this was ultimately opted against, with the decision to power ahead with companies to facilitate conversions of their existing models and the upcoming 777-8F.
The 767 family remains an industry workhorse, its place so important to some airlines that they’d argue nothing has perfectly replicated what this family has done for their operations, even despite newer technologies being adopted.
For airlines like Delta, United Airlines, and others, and certainly in the United States, the 767 has carried passengers for decades and will continue to do so for years to come, while also serving as an important freighter solution.

In an age when some of the world’s largest planes, such as the A380 and 747-8, have failed to sustain production or achieve the impact initially intended, jets like the 767 have thrived.

ABOUT THE AUTHOR
Daniel Fowkes is a Melbourne-based aviation analyst and journalist with over a decade of industry experience. As founder of Dj’s Aviation, he delivers trusted analysis on aircraft, airline strategy and global aviation trends for djsaviation.net
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