More Trouble for Boeing?

Unable to get their new 737 MAX back in the air this year so far, inspectors have recently found “wing related cracks and damage” in nearly 40 older 737s.  The cracks or structural damage has been found in the parts that attach the wings to the body of the aircraft — Boeing said  they were “looking for the root cause” of the damage?  Guess that’s Boeing talk for “we have no idea what to look for.”