https://www.cbsnews.com/news/airline...investigation/
Obviously this will get some attention, but more context and details would be needed. For current mechanics to blow the whistle on network television, rather than to the local FSDO, seems counter-productive.
"Overlook" a technical issue that is also an airworthy issue? Illegal, and if deliberately told by management to do so - criminal.
Overlook a technical issue that's not an airworthy issue (like a broken headphone jack on a setback screen, for example), more likely a cost savings measure to wait and tackle at next bigger check.
Side note - didn't AA veer from the manufacturer procedure for removing/reinstalling the engine on the DC10 that led to the landmark Chicago crash 40 years ago?