NASA has a ton of regulation and oversight that their contractors abide by. However, if you are in a trusted position of testing materials and not only you but

NASA has a ton of regulation and oversight that their contractors abide by. However, if you are in a trusted position of testing materials and not only you but your entire lab is compromised by cheating, how is anyone going to really find out unless someone speaks up? They were speeding up the test equipment between customer visits of the lab. This wasn't just laziness or someone fudging the numbers because its close enough, this was straight up fraud. NASA can't afford to test every little bit of everything that goes into a rocket themselves. They rely on their contractors to do their due diligence and make sure their vendors do everything right. Maybe a lot of stuff slipped past. There's probably bits of deficient aluminum all over the place but it held up enough during testing so no one noticed.