Noel Rock (Dublin North West, Fine Gael) | Oireachtas source

On the more expensive unforeseen works, particularly the figure of €2.5 million cited in 2016 as the estimated cost of overhaul of the engine, how was it derived? Typically repair costs tend to be in a range such that one would carry out repairs to have a further two or five years of flying time? What further flying time would one expect to have in spending €2.5 million on repairs?