Workers are trained and qualified to sign of on their work. Some work is double checked by a co-worker. Some is again checked by QA. FAL work, and loose bolts f

Workers are trained and qualified to sign of on their work. Some work is double checked by a co-worker. Some is again checked by QA. FAL work, and loose bolts falling under FOD absolutely, are checked by QA. Or at least should be. No idea how this can happen, Boeing really has to get its shit together.