Boeing performs pressure tests but does not normally adjust Max 9 panels -source
Boeing does not typically make adjustments to the type of panel involved in last week's 737 MAX 9 blowout unless factory tests reveal a problem, a source familiar with Boeing's industrial process said on Friday. Sources told Reuters last week Boeing supplier Spirit AeroSystems sends semi-completed fuselages from its factory to Boeing with the special panel, which replaces an optional emergency exit, fitted but not completed. Those sources said Boeing workers usually remove the panel, and use the gap to install pieces of cabin equipment, before replacing the panel and finishing the ...
Source: yahoo.com