CF34 - 8E as fitted to Ejets
Here are the definitions of the 4 idle settings on the Ejets.
IDLE
The IDLE modes are automatically adjusted by the FADEC in order to maintain the minimum thrust necessary to provide the required bleed pressure to the airplane.
Flight Idle N1 varies with altitude and can change as a function of ECS and anti-ice bleed requirements.
The idle mode selections are the following:
• Flight Idle.
• Approach Idle.
• Final Approach Idle.
• Ground Idle.
IDLE THRUST IN ICE CONDITIONS
Whenever ICE CONDITION is sensed the N1 for the FLIGHT IDLE and APPROACH IDLE is automatically increased to maintain the minimum bleed pressure required for the ANTI ICE system operation.
With the FINAL APPROACH IDLE there is no N1 automatic increase but a cyan dash is displayed on both EICAS N1 dial to show the minimum thrust required to maintain the bleed pressure required by the ANTI ICE system.
FLIGHT IDLE
The flight idle mode is active anytime in flight when the approach idle is not selected.
APPROACH IDLE
Approach Idle is used in flight to enable rapid acceleration to go-around thrust. Approach idle is activated as follows:
• Altitude less than 15000 ft;
• In flight;
• Flaps 1 or greater; and
• Landing gear down.
FINAL APPROACH IDLE
Final Approach Idle is active as follows:
• Altitude lower than 1200 ft AGL;
• Landing flaps;
• Landing gear down.
GROUND IDLE
Ground Idle is the minimum thrust setting. Ground Idle provides the minimum stable engine thrust level for ground operations.