On 16 January 2014, the planned entry-into-service date was delayed again, due to difficulties with certification flight testing, by at least 12 months, to the second half of 2015; the CS300 was still to follow approximately six months after the CS100.
O 16 de xaneiro de 2014 a data de entrada en servizo foi adiada outra vez polo menos 12 meses debido a dificultades coa certificación das probas de voo, ata a segunda metade de 2015; o CS300 debería entrar en servizo uns seis meses despois do CS100.