Bloomberg: Air New Zealand Ltd., the nation’s biggest airline, said a test flight in one of the company’s Boeing Co. 747-400 jetliners proved the commercial viability of jatropha oil as an alternative fuel. The trial, a joint program with the aircraft maker, Rolls Royce Group Plc and Honeywell International Inc.’s UOP Llc. unit, tested a 50-50 blend of jatropha oil and conventional jet fuel in one of the aircraft’s four engines. Just under two hours of flight tests were conducted over the …