Here is the more burning question: What is worse?
Case "It was not made to design standards":
Then boing might have a problem in their manufacturing processes, which is going to have ramifications on the entire fleet. This would be bad, but fixable.

Case "It was made to design standards":
In that case you only have a problem with this one type of jet, but you have a problem in your fundamental design, which might ground the entire fleet (again).