Under the blade

b1-66er

https://kdvr.com/news/local/ap-infrequent-inspection-of-fan-blades-led-to-a-united-jet-engine-breaking-up-in-2021-report-says/ 

b1-67er: In a way the process worked. The blades were inspected and a defect was detected. Then a judgement call was made, in retrospect the wrong one. I think you lower your tolerance for defects and move on.