ATA 76 - ENGINE CONTROLS

• The relationship between the throttle lever angle and throttle resolver angle (TRA) is linear and: 1 deg. TLA = 1.9 TRA.

• Thrust lever excursion:

- IDLE TO MAX CLIMB = 25°

- IDLE TO MCT /FLEX = 35°

- IDLE to TO/GA = 45°

- Full T/R to TO/GA = 65°

• Each Thrust Lever has 2 resolvers, one linked to ECU CH.A and the other to ECU CH.B, resolvers convert linear movement of the thrust levers from analog to digital format in order to feed the FADECs.

• An adjustment screw is provided at the lower part of each mechanical box to adjust the artificial feel.

• In automatic control mode the FMGC (Flight Management and Guidance Computer) computes the required N1 thrust and transmits it to the FADEC via the Flight Control Unit (FCU).

• Notice that in case of an alpha floor detection the auto thrust function engages and becomes active automatically.

• Manual control of Thrust lever are moving.

• Auto thrust levers stay on the gate, if levers are between the gates thrust

correspond with upper gate.

• At 106,3 % of N2: Overspeed

• Cockpit manual control on Engine Master Switches have always priority over ECU commands.

• ENG MASTER SWITCH “ON”:

- Starts the engine in automatic mode

- Selects Fuel and Ignition ON during manual start

- Opens LP Fuel Valve and de-energize HP Fuel Shut-off valve (so it can open)

• Fuel HP Shut-off Valve closes when energized.

• ENG MASTER SWITCH “OFF”:

- HP Fuel Valve closes (Valve is energized)

- LP Fuel Valve closes

- ECU resets