He may be onto something, but the fact of the matter is that he wanted the minister to intervene in a relationship which had already been established; the DAA had leased the building to EI; what exactly is the minister expected to do? To intervene in that could give rise to a civil action by Aer Lingus ("incitement to breach of contract")?
If FR wants a hangar at DUB, there is plenty of space for it to do so; there are other hangars more than capable of taking 738s, so it just adds to the questions that need to be asked of FR/MO'L.