* SIA has selected Rolls-Royce Trent 1000 to power 787-10s, which are to be operated on medium-range routes * signs LOI with US airframe manufacturer comprising 39 firm orders plus six options for each aircraft type, if exercised will enlarge deal to as many as 51 aircraft Source text for Eikon: Further company coverage: DUBAI, Feb 9 Bahrain-based Investcorp is responding to the election of U.S. President Donald Trump and Brexit by seeking investments in U.S. business services and British real estate, the private equity firm’s Co-Chief Executive Rishi Kapoor said.