Aer Lingus are not in trouble.
Ryanair claim to have €2 Billion in the bank while Aer Lingus have €800 Million. Relative to their size Aer Lingus are better capitalised and when you look at their financial commitments (140 aircraft in the next 4 years) there is no comparision.
This is an understandable attempt to make the company leaner, that's all.