I've done a couple rounds through aerospace or aerospace-adjacent over the years. This seems to be a certification test (https://www.seattletimes.com/business/

I've done a couple rounds through aerospace or aerospace-adjacent over the years. This seems to be a certification test (https://www.seattletimes.com/business/boeing-aerospace/boeing-discovers-engine-part-defect-and-grounds-its-777x-test-airplanes/ https://www.seattletimes.com/business/boeing-aerospace/boein...), aka the "make-or-break, 0-failures allowed test before we get final approval to sell this aircraft, and we are 99.999% sure this test is going to go flawlessly". Failing is a pretty big deal. This should have been found far sooner in the process.