An unpainted Boeing 737 MAX aircraft is seen parked in an aerial photo at Renton Municipal Airport near the Boeing Renton facility in Renton, Washington, U.S. July 1, 2019. Picture taken July 1, 2019.
Lindsey Wassen | Reuters
The problem is the latest to impact the planes, which were grounded for most of 2019 and 2020 after two fatal crashes killed 346 people. Boeing had resumed deliveries of the jets, its best-selling aircraft, late last year after regulators approved a number of fixes after the crashes.
A final fix for the planes has…