I am still skeptical as to whether is it a known defect just based on the documentary. One thing that documentary also stated is the fact that the whistleblowers are entitled to compensation if their action succeeds. Are they in it for the "safety" or for the money?
No idea, i'm skeptical also, it's just that the issue with the planes breaking at certain points which they pointed happened again. I'd like someone independent that we can trust to do an investigation (like CASA or the safety board) and let us know if it's all good or not.