But Boeing doesn't appear to be maintaining any significant ownership or control over the company. They have other customers, including Boeings biggest competi

But Boeing doesn't appear to be maintaining any significant ownership or control over the company. They have other customers, including Boeings biggest competition. Usually the term "liability sheild" would impy that the subject still owns, controls, or otherwise profits from the companies operations, while shielding the subject from liability for the companies actions. It appears that Spirit is in fact very independant from Boeing at present.