Apparently Rolls-Royce engines are all equipped with a box that transmits automatically, probably each hour, a variety of data: engine data, position data, instructions and a unnamed function. Airlines are aware the box is fitted and it would be visible in any strip-down, but the box remains R-R property. Malaysian Airlines did not pay R-R for this data to be transmitted, collected and analysed. Some nations insist - legally - that this data be collected.