Unlike on a rollercoaster, these bolts are hidden within the fuselage behind the cabin panelling so a regular visual inspection to see if they've been loosening

Unlike on a rollercoaster, these bolts are hidden within the fuselage behind the cabin panelling so a regular visual inspection to see if they've been loosening wouldn't be practical. During assembly the bolts should have been torqued and then checked and the bolts would only be reinspected when the panelling is removed after 3 years or so.