https://www.cnbc.com/2018/07/17/rolls-royce-is-developing-tiny-cockroach-robots-to-fix-airplane-engines.html > Rolls-Royce said Tuesday it is developing tiny “cockroach” robots that can crawl inside aircraft engines to spot and fix problems. > The U.K. engineer said the miniature technology can improve the way maintenance is carried out by speeding up inspections and eliminating the need to remove an engine from an aircraft for repair work to take place.