Airline staff have been engaged in a long running dispute over a massive deficit in the company pension scheme.
In a statement the group of unions at the airline say they will begin discussions about a co-ordinated action and expect the process to be completed within a fortnight.
However the unions also state they remain open to talks with Aer Lingus management to resolve the dispute.
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Its feared any action could result in flight disruption during the busy St. Patrick's day period.