Big argument over the 500 for training with EASA/ CAA over the years !
1. It is a turbine and so need special permission
2. Arguments being a 5 seater, it is actually a 4 seater as the duals take up the 5th person seat. Originally CAA wanted nothing to do with it until Ron Jenkins at Gatwick established some order !
Probably the most fun helicopter to fly along with a 341. Biggest problem most find is the excessive pedal inputs . It is shorter than a 300 but has an engine with twice the power so has a powerful tail rotor but on a short lever arm, hence the pedal inputs. See crash on River Thames 2 weeks ago !