SIPTU says planned strike is due go ahead on 14 March
Irish trade union, SIPTU, has said it has no plans to call off its threatened industrial action at Aer Lingus and the Dublin Airport Authority (DAA).
Aer Lingus staff are opposed to changes being made to their pensions without their consent.
DAA staff also face reform of their pension arrangements.
A four-hour strike, from 05:00 GMT to 09:00 GMT, is due to go ahead on 14 March at Dublin, Cork and Shannon airports.
An expert panel has been appointed to investigate the long-running dispute over threatened benefit cuts in the joint aviation pension scheme.
It is due to issue a preliminary report at the end of March.
The dispute centres on a 750m euros (£618m) deficit in the pension scheme that covers staff at the airline and the DAA.