"We're turning the corner," Ortberg said. "We've got more work to do.
But I'm pleased with the progress so far."
Boeing is seeking to increase monthly output of its 737 program to 63 units from 47, while aiming to raise 787 Dreamliner production to 10 aircraft per month by the end of the year.
"We still have to ramp up higher," Ortberg said. "The market is strong.
It's all about delivering more airplanes."
Customer feedback has urged the manufacturer to focus production resources on existing aircraft models before launching new narrow-body designs.
"Customers are telling us 'Let's focus on the existing product'," Ortberg said.
Industry analysts note that leadership changes have helped restore operational discipline at the manufacturer.
"The verdict is very much in on Boeing, and the verdict is favourable," said Richard Aboulafia, an aviation analyst.
Parallel to international sales challenges, US domestic airlines have also avoided purchasing the 777-9, primarily due to its size and price tag relative to existing fleet structures.
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United Airlines and American Airlines maintain relatively young 777-300ER fleets averaging 8.6 and 12.5 years of age respectively, eliminating immediate demand for replacement aircraft in that size category.
