Originally Posted by
300cbi
505 engine will be the same turbomecca as 120
Not exactly. The 505 gets a evolution from the 2F on the 120 benefitting from FADEC where 120 is still hydromechanical and higher maint intervals-follow the improvements on the 135 and you will see 120 has original hydro first design vs 505 like new 135 FADEC improved Arrius