On my B787's the idle speed is too high and I'm not sure what in the aircraft.cfg controls this. The N1 idle is 34% and the aircraft tries to run away. My other aircraft usally idle at 25% and don't creep as much. Can someone direct me how to lower the idle speed a bit? Thanks

Old jet engines such JT3D (B707/DC-8), JT8D (727,732,DC-9...) has Higher Idle N1% readings.The idle values, ISA day @ MSL in the JT8D-17 are: 35%N1, 59%N2 380