Boeing has resumed production of the 737 Max at its Renton factory in the US despite the programme taking a number of hits in recent weeks.
Max production was frozen in January amid uncertainty as to when the grounded aircraft could return to service.
Boeing is building the planes “at a low level” while it implements workplace safety measures in response to the global coronavirus pandemic, but plans to gradually ramp up production this year.
The 737 Max was grounded worldwide in March 2019 following two fatal crashes involving the jet which killed 346 people in total.
Earlier this year, Boeing outlined mid-2020 as a date for the return of the Max but since then international travel demand has been decimated by Covid-19.
Delivery deferrals and order cancellations have dealt further blows to the Max programme.
Boeing lost 108 orders for its 737 Max aircraft in April causing its order book to slip below 5,000 for the first time in seven years.
During the production suspension earlier this year, mechanics and engineers worked to standardise work packages in each position of the factory, Boeing said.
“The steps we’ve taken in the factory will help drive our goal of 100 per cent quality for our customers while supporting our ongoing commitment to workplace safety,” said Scott Stocker, vice president of 737 manufacturing.