
China’s COMAC has moved its newest C919 variant into the next stage of overall certification, with taxi tests ongoing in Shanghai.
The development sees the C919-600, as it has been named, be put through its paces at a facility in Shanghai to prepare not just for the first flight but for eventual certification.
COMAC’s Niche C919-600
The C919-600 is a shortened derivative of the standard C919 variant. This is a single-aisle jet produced by COMAC aimed at competing with Airbus and Boeing in the A320neo and 737 MAX families. However, the -600 model is more niche-oriented.
This variant has been developed specifically for operations at high-altitude airports, with a particular focus on the Tibetan Plateau and other regions with thinner air across China.
A reduction in overall fuselage length and a subsequent drop in seating capacity have enabled COMAC to enhance the model’s performance and climb capabilities in hot-and-high conditions, where runway length and air density pose greater challenges for operators.
What is more closely related to the A319 and smaller 737 variants, if comparisons were to be made, the C919-600 isn’t intended for the same type of routes as the base C919 model. Instead, it’s those thinner routes and high-altitude locations.

Called the Pataue, the niche-type aircraft is being developed not just by COMAC but also with Tibet Airlines, which has long been documented as the launch customer, thanks to a large order placed. That deal is part of efforts to evolve its aviation and tourism sectors with a purpose-built aircraft suited to its conditions.
Tibet Airlines and its airports are unique in that they face more challenging conditions than those in the typical market. As such, with longer runways and thinner air, jets like the C919-600 help make operations feasible and efficient, which is why such a variant has been of heightened interest.
A Taxi Test For The C919-600
Work on the launch of the C919-600 has been ongoing. The beginnings of low- and medium-speed tax trials, and even high-speed runs to examine how the brakes function in greater depth, are another important validation of the existing platform.
The C919-600 is still aiming for a first flight sometime soon, followed by entry into commercial service. However, these steps would occur only if COMAC were able to meet the certification milestones ahead of schedule, as set out in its timelines.
The model in question is registered as B-002U and listed as just 0.5 years old. It is a testbed that’ll enable certification. Social media images show the plane conducting work. Those images first appeared on Weibo and were later shared on X, Facebook, and similar platforms.
Taxi tests are important for COMAC to complete, and part of the comprehensive ground evaluations conducted before the airborne part of the certification process can commence. With the Chinese planemaker aiming to be an industry disruptor, derivatives such as the C919-600 show its eagerness to appeal to niche markets and innovate.
A Rival To Airbus & Boeing Or No?
The C919-600 stands apart from the C919 and is part of a comprehensive effort by COMAC to closely mimic what Airbus has successfully done with its A321neo series, launching several derivatives purpose-built for specific niche markets to attract customers with their perfect aircraft.
In the C919-600s case, this is an aircraft tailored to shorten, and it has been aimed at high-altitude locations with thinner air, something many operators in Western markets that would commit to the A320neo or 737 MAX families would not be looking for.
The aircraft, therefore, is more of a targeted niche model rather than an outright competitor to what Airbus and Boeing are offering, and a different approach to its base C919 model, which is certainly pitched to compete with the two leading Western manufacturers.

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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