Management and employees at Luxembourg's flag carrier Luxair remain unable to reach a settlement on a future labour agreement.
The LCGB and OGBL unions have called for protests in front of the country's ministry for labour on 20 June, when the two sides meet for a second round of arbitration talks. But the protest will not be a strike, which Luxembourg regulations do not permit at the present stage of the dispute.
A labour agreement is still in place, but will automatically expire on 1 October as a result of a decision the loss-making airline took last October. The unions involved the ministry's arbitration service because no agreement could be reached after they demanded a six-month extension of the old agreement to start negotiations for a new deal in "a climate without strain and pressure".
Luxair had demanded staff concessions before the management was willing to enter any talks, say the unions.
The carrier has offered two options for a settlement. The first is to extend the current contract until year-end and involve an external consultant - rather than an arbitrator - to work out a deal. The second avenue would be to extend the old agreement until the end of March 2014 but to suspend the company's pay structure. The union says that this would mean freezing salaries indefinitely.
Both options have been rejected by the unions.