Complex sentence: In 2013, Snecma announced that they planned to use the A340 as a flying testbed for the development of a new open rotor engine, this test aircraft is forecast to conduct its first flight in 2019.
Split into simpler sentences: In 2013, Snecma announced that they planned to use the A340 as a flying testbed for the development of a new open rotor engine. This test aircraft is forecast to conduct its first flight in 2019.