I hope you're trolling or are just a management lackey. I've filed five grievances in my few years here each of which were balatant black and white violations of my employment contract. If F9 refuses to respect the requirements of the contract why should any new hire feel the need to keep up their end of the bargain. In such a scenario said contract becomes null and void.

Regarding the enforceability of the training contract it depends on which state you live in and how determined the company is to spend resources to go after you. Generally companies realize it's not worth the effort given the uncertain outcome in court. That being said the new scam in the netherworld of the aviation industry is to get you to sign a promissory note which is nearly impossible to get out of in lieu of a training contract.