SIPTU HAS served notice of industrial action on the Dublin Airport Authority and Aer Lingus that could send Dublin Airport into chaos from October 1.The union said the dispute has arisen because of an 'impasse on negotiations over the future of the Irish Airlines (General Employees) Superannuation Scheme'. SIPTU said the move followed 'a decision by the employers to renege on their obligations, under relevant collective agreements, in relation to the scheme'. The industrial action is scheduled to commence on Monday, October 1, and will take the form of staggered two-hour work stoppages on a location by location basis. A SIPTU spokesperson said that it is hoped that a 'fair and reasonable' resolution to the dispute can be achieved. The spokesperson said: 'As always we remain available to achieve a fair and reasonable outcome to this industrial episode. 'We believe the new and unfair funding standards imposed by the pensions regulator are at the root of this problem. Over 300,000 thousands workers in private pension funds are adversely affected by this crisis.' The companies involved in the dispute have expressed regret at SIPTU's decision and say they remain committed to working at the Labour Relations Commission to resolve the matter.