Greetings,
FYI today you have to be compliant with RNP specific legs (most of them Turns and/or curves, I thnk it is the RTCA DO 236A spec) at least to be sure that the aircraft will stay within the RNP corridor during a Turn, so what was a cost
yesterday is a price today
.
Most airlines make the same mistakes time and time again, instead of taking the advantage of competition during equipment selection (BFE) and get a very good price, they skip options, few years later there is an operational requirement and then BANG
