ELEVATOR - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. General

two elevators hinged on the trimmable horizontal stabilizer (THS) ensure the pitch control (Ref. 27-40).
The elevators are controlled by :

the Elevator and Aileron Computers (ELAC : Ref. 27-93) in the normal mode
the Spoiler and Elevator Computers (SEC : Ref. 27-94) in case of ELAC failure.

The control orders are computed from signals that the two electrically-coupled side stick controllers send.
The artificial feel system (Ref. 27-92) operates independently of the flight conditions.
Two electrohydraulic servocontrols (Ref. 27-34) hydraulically actuate each elevator.
The position of the elevators is shown on the lower display unit of the ECAM system via the Flight Control Data Concentrator (FCDC : Ref. 27-95).
On ground, with hydraulic systems not pressurized, the elevators 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

2. Interface with the Autopilot System (Ref. 22-70)
In the AP mode, the ELACs receive the FMGC orders and transfer them to the servocontrols.
The pilots can cancel the automatic mode through the override of a disengagement system, installed on each side stick controller.
The disengagement system includes a spring device and a solenoid energized by the FMGCs.

[Rev.10 from 2021] 2026.03.31 23:49:59 UTC