FILE PHOTO: An aerial photo shows Boeing 737 MAX airplanes parked on the tarmac at the Boeing Factory in Renton

An aerial photo shows Boeing 737 MAX airplanes parked on the tarmac at the Boeing Factory in Renton, Washington, on March 21, 2019. 

WASHINGTON — Boeing said on Wednesday it was replacing the head of its troubled 737 MAX program effective immediately, the first major executive departure since the Jan. 5 mid-air panel blowout of a new Alaska Airlines MAX 9.

Ed Clark, who had been with the planemaker for nearly 18 years, departed as Boeing has been dealing with its latest crisis and has vowed to bolster quality efforts.