Fears are growing for the future of 465 jobs at the Lufthansa Technik Airmotive plant in Rathcoole in Dublin.
Management have issued a notice to staff warning that unless an agreement on new work practice and overtime arrangements is fully operated by staff, they will be put on protective notice from Monday.
Earlier this year, workers at the engine maintenance plant voted by 229 votes to 60 to accept the proposals - negotiated under the auspices of the National Implementation Body - which were to secure a $40m investment in the plant to establish a new maintenance line for a new brand of jet engine.
The engines which the plant currently maintains will soon be obsolete, and without the new line, the prospects for the company's irish operation are bleak. The agreement would have secured the future of the plant for the next 20 years. But management has claimed that workers have failed to honour the agreement, and that some staff are refusing to do overtime - as a result of which work has had to be turned away.
Beru fate unclear after meeting
Uncertainty continues to surround the future of 202 jobs at the Beru electronics plant at Tralee in County Kerry.
Workers summoned to a meeting again today said they had been told that they had lost the main production line to a sister plant in Germany, but that the Tralee plant would remain open. But they were given no indication of job security.
Local management refused to comment this afternoon on the briefing, saying only that a statement would come from the company's German headquarters in the next few days. Workers said up to 40 jobs could go but management refused to confirm or deny that figure.
SIPTU's Ted Kenny said there was fear and frustration among the workers at the car components plant because of the uncertainty. He criticised management for keeping workers 'on a string'.