ALL. THE. FREAKING. TIME. I’m a former flight attendant with 10 years on the line. My father retired as a 767 Captain with 33 years. HAPPENS ALL THE TIME, but it doesn’t get news coverage because they didn’t previously want the airlines to collapse and be nationalized like Amtrak.
If aircraft flights are being cancelled for serious issues, “All the time” at the last minute just prior to take offs, maybe they should go out of business. Engine failures during take off at low altitudes can lead to death for all.