Complex sentence: In December 2015, British Airways announced that a team of engineers from Boeing assessed the aircraft and determined the damage was limited and suitable for repair and as a result, it was announced that the aircraft would be repaired and returned to service.
Split into simpler sentences: In December 2015, British Airways announced that a team of engineers from Boeing had assessed the aircraft and determined the damage was limited and suitable for repair. As a result, it was announced that the aircraft would be repaired and returned to service.