On May 15, 2012, Acaba was one of three crew members launching from Kazakhstan aboard the Soyuz TMA-04M spacecraft to the International Space Station.
O 15 de maio de 2012, Acaba era un dos tres membros da tripulación de lanzamento desde Kazajstán a bordo da nave espacial Soyuz TMA-04M á Estación Espacial Internacional.