I have an uncle, he is a mechanic for Kone Starlift. I know there are yearly checkups, law says so, Kone recommends 3 or 6 months sometimes depending upon the amount of use and will make a note of said refusal in contracts so clients almost always budge, some have telemetry now that will call Kone (likely others too) on its own for preventative maintenance outside of schedule, steel cables have a very wide margin, they will squeal as soon as they are overloaded and telemetry if present will call the office as soon as it happens, if maintenance fails and the cable snaps the brakes will come on and seal it in place. These things are safe and if anything overly maintaned. A steel bucket crashing to the bottom floor full of people is bad publicity. Nobody wants that. If anything, it being stuck is the good thing. It will not move if anything is off. The real issue is when it goes into freefall.