DOC AIRBUS | AMM A320FAILERON - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
One aileron (operational at all speeds) and four spoilers ensure roll control on each wing.
The Elevator and Aileron Computers (ELAC Ref. 27-93) electrically control the ailerons.
The Spoilers and Elevator Computers (SEC Ref. 27-94) electrically control the spoilers.
The two side stick controllers deliver electrical signals which are used for the computation of the control orders.
The operation of the artificial feel system (Ref. 27-92) is independent of the flight conditions. There is no roll trim control.
Two electrohydraulic servocontrols (Ref. 27-14) hydraulically actuate each aileron.
One electrohydraulic servocontrol (Ref. 27-64) hydraulically actuates each spoiler.
The position of the surfaces is indicated on the lower ECAM display unit through the Flight Control Data Concentrator (FCDC) (Ref. 27-95).
On ground, with hydraulic systems not pressurized, the ailerons may or may not droop down to the servocontrol stop depending on the scatter of bearing and seal friction.
** ON A/C NOT FOR ALL One aileron (operational at all speeds) and four spoilers ensure roll control on each wing.
Aileron Block DiagramThe Elevator and Aileron Computers (ELAC Ref. 27-93) electrically control the ailerons.
The Spoilers and Elevator Computers (SEC Ref. 27-94) electrically control the spoilers.
The two side stick controllers deliver electrical signals which are used for the computation of the control orders.
The operation of the artificial feel system (Ref. 27-92) is independent of the flight conditions. There is no roll trim control.
Two electrohydraulic servocontrols (Ref. 27-14) hydraulically actuate each aileron.
One electrohydraulic servocontrol (Ref. 27-64) hydraulically actuates each spoiler.
The position of the surfaces is indicated on the lower ECAM display unit through the Flight Control Data Concentrator (FCDC) (Ref. 27-95).
On ground, with hydraulic systems not pressurized, the ailerons may or may not droop down to the servocontrol stop depending on the scatter of bearing and seal friction.
2. System Description
A. Interface with the Autopilot System (Ref. 22-60)
In AP mode, the FMGC orders are received by the ELACs which transfer to the SECs the order which correspond to roll spoiler control.
The position of the side stick control is not slaved to the AP control orders.
The pilots can cancel the automatic mode, through the override of a disengaging system (which includes a spring device and a solenoid) installed in each side stick unit.
In AP mode, the FMGC orders are received by the ELACs which transfer to the SECs the order which correspond to roll spoiler control.
The position of the side stick control is not slaved to the AP control orders.
The pilots can cancel the automatic mode, through the override of a disengaging system (which includes a spring device and a solenoid) installed in each side stick unit.