Upon applying there was the option to read the faq section, in that section all of these questions were answered. You pay 25000 in 5 installments, then you are bonded with Aer Lingus for 7 years. If you leave before the 7 years are up you are required to pay back another chunk of the training costs. PPJN is outdated in for many airlines, considering this year AL have a different financing scheme it's highly unlikely to be correct.