Aircraft is fully used during the summer schedule:
KIR-DUB-KIR
KIR-HHN-KIR
KIR-DUB-KIR
KIR-LTN-KIR (except for SUN/MON when it is operated by a LTN based aircraft)
KIR-DUB-KIR
In any case, there isn't enough time between the DUB flights to operate an ALC/FAO return.