Slim - I understand what you're saying about contract, but in any contract between 2 companies there is likely to be an understanding of a small degree of flexibility. It's much too difficult to draw up a contract which is both legally watertight, and allows for the fact that events may sometimes prevent strict observance of the contract.
An example on the side of the handling agent might be very minor delays (e.g. the occasional minute because there was a flu bug going round and half the staff were sick) for unloading bags. Equally, an airline might be guilty of minor infractions as well for perhaps being a day or two late settling the monthly bills for fuel. Technically any infraction, however minor, still counts as breach of contract for which legal action potentially can be taken - although a court may of course award damages of maybe 1 euro.
Do we have information as to the scale of the alleged breach of contract? Is it one-sided or have both parties performed minor breaches ? Could these minor breaches be simply an excuse for a more significant action on the side of one of the parties involved ?
I don't have the information in this case - but it would be interesting to hear the AEI's side of the story as well before making a judgement.