Talks aimed at resolving the Aer Lingus dispute over the threatened closure of the cabin crew base at Shannon have adjourned.
They will resume tomorrow at the Labour Relations Commission.
IMPACT earlier warned that it is prepared to strike if the dispute over outsourcing jobs on new routes from Shannon is not resolved.
Assistant General Secretary Michael Landers said that cabin crew had voted overwhelmingly to take strike action.
He said that was something that would come to pass if there was no resolution to the dispute.
Management sources have said that time was of the essence, as tickets have already been sold for the flights commencing 6 January.
Last month, Aer Lingus announced that it would be outsourcing cabin crew work on new routes from Shannon using smaller planes than usual.
The company blamed a union refusal to operate the flights with a lower number of cabin crew on board.
It also said it would be closing its cabin crew base in Shannon.
As a result, 87 jobs are in jeopardy and 30 trainees who had been taken on were let go.
Mr Landers has said he is optimistic that a solution could be found today, but warned about the vote for industrial action.
He said the union had also retained solicitors to prepare legal proceedings.
Management sources noted that there are just 59 days to go until the first disputed flights take off.
Given the time required for training and preparation, they said the window for securing a resolution was very tight.
They said they need to prepare either to train existing staff, or confirm outsourcing of the work.