Originally Posted by
Outwest
Why would this be different for basically the same engine as a 212/412/Aw139?
As I recall, the igniter switch requirement/lack of is based on airframe interface and engine type (A,B,C,E,T, etc) as I believe a AW119 has a separate igniter switch for its PT6B. Keep in mind, while the core engine is all the same on the PT6, the accessories/systems are very different in how things are controlled especially between a fixed-wing and rotor-wing application. As for the 10% delay in actuating the switch that would be an Air Tractor process. Perhaps shoot them a mail as they have a good support team.