The EY positioned DUB-MAN empty.
DUB is daily B77W and 4 weekly A330 and MAN is daily B77W and daily A330.
The DUB flights have been maxed out today so the decision was made to extend the EY21 1 way to DUB. Crew hours would not have been an issue as AUH-MAN is nowhere near the limit of flying time.