skol
bsieker,
You obviously didn't graduate in physics.
Fan blade-off containment is a design requirement that needs to be demonstrated before certification of any engine.
However, I understand that turbine disc failure is impossible to contain due to the extremely high energy involved without crippling weight penalties, so the disc is designed so it can't fail.
A turbine disc failure is a monumental event in airline operations.
So I rather think that bsieker is spot on with his comment...