Airbus has stressed that it will not redesign the A350-1000 despite Qatar Airways' dissatisfaction with the latest iteration of the twinjet.
The airframer pushed back the entry into service of the aircraft to 2017 earlier this year, having opted to fit a higher-thrust Rolls-Royce Trent XWB powerplant and increase its payload-range capability.
Dubai-based carrier Emirates has already criticised the redesign and Qatar Airways chief Akbar Al Baker, during the Dubai air show, echoed its Gulf rival's thoughts.
"Our opinion on the -1000 remains the same," he said. "We are not happy."
But Airbus chief operating officer for customers John Leahy insisted that there would be no return to the drawing-board for the aircraft, and suggested that the Doha-based carrier was not fully informed of the A350-1000's capabilities.
"We clearly need to get a sales team to Doha to explain the aircraft," he said. Qatar Airways is the launch customer for all three A350 variants.