The aircraft overhaul industry xray checks recip engine cranks, rods and sometimes engine cases for subsurface cracks and irregularities. Those engines are built to stand up to 75% load for hours on end, similar to heavy duty truck engines. Automotive engines get a quick blast at full power for a few seconds and then are in cruise at say 10% to 20% load the rest of the time. That is why certified aircraft engines have a TBO of 1500 to 2000 hours generally and the xray NDT examinations. When an automotive componenent fails, we pull over to the side of the road. An aircraft comes down. This is also why they are mandated to have dual ignition systems, usually magnitos.