Complex sentence: Thus, a completely new aircraft--no longer related to the 12X family--was launched, and no common parts from EMB 121 Xingu was used, and the capacity was revised from 24 to 30 seats.
Split into simpler sentences: Thus, a completely new aircraft--no longer related to the 12X family--was launched. No common parts from EMB 121 Xingu were used, and the capacity was revised from 24 to 30 seats.