Failure of the Roll Side Stick Transducer Unit Potentiometer or of the R G Aileron Servocontrol

TASK 27-93-00-810-937-A
Failure of the Roll Side Stick Transducer Unit Potentiometer or of the R G Aileron Servocontrol

1. Possible Causes

SSTU-ROLL CTL, CAPT [4CE1]
SSTU-ROLL CTL, F/O [4CE2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 27-10-00-810-819-A	Failure of the Right Green Aileron Servo Control Position Transducer
TSM TASK 27-10-00-810-820-A	Loss of the Right Green Aileron Position Transducer Signal for the ELAC 1
TSM TASK 27-10-00-810-821-A	Loss of the Servovalve Signal for the Right Green Aileron Servo Control
TSM TASK 27-10-00-810-823-A	Failure of the Right Green Aileron Servo Control Servovalve
TSM TASK 27-10-00-810-824-A	Failure of the Right Green Aileron Servo Control Solenoid Valve
TSM TASK 27-10-00-810-825-A	Loss of the Right Aileron Changeover Signal for the ELAC 1
TSM TASK 27-93-00-810-985-A	Failure of the Roll Side Stick Transducer Unit Potentiometer or of the R G Aileron Servocontrol (New-Generation Side-Stick Unit)
AMM 27-92-41-000-002	Removal of the Transducer Units
AMM 27-92-41-400-002	Installation of the Transducer Units
AMM 27-92-41-860-801	Identification of the Side Stick Installed on the Aircraft
AMM 29-10-00-863-001	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart

3. Fault Confirmation
Subtask 27-93-00-860-107-A

A. Side Stick Identification
(1) Do the identification of the side stick installed on the aircraft AMM 27-92-41-860-801.
(a) If a new-generation side-stick unit is installed on the aircraft, refer to the trouble shooting procedure (Ref. TSM TASK 27-93-00-810-985).
(b) If the side stick installed on the aircraft is not a new-generation side-stick unit, continue this procedure.

Subtask 27-93-00-700-174-A

B. Test
Not applicable, you cannot confirm this fault on the ground.

4. Fault Isolation
Subtask 27-93-00-810-197-A

A. With Green hydraulic system pressurized AMM 29-10-00-863-001, on the F/CTL page of the Lower ECAM DU, if the R AIL G servocontrol indication is amber:

do this trouble shooting procedure (Ref. TSM TASK 27-10-00-810-819).

(1) On the panel 23VU, release and push the FLT CTL/ELAC 1 pushbutton switch.
(2) On the upper ECAM DU, if the F/CTL AIL SERVO FAULT warning stays in view:

do this trouble shooting procedure (Ref. TSM TASK 27-10-00-810-820).

(3) On the panel 23VU, release and push the FLT CTL/ELAC 1 pushbutton switch.
(4) On the upper ECAM DU, if the F/CTL AIL SERVO FAULT warning stays in view:

do this trouble shooting procedure (Ref. TSM TASK 27-10-00-810-821).

(5) On the panel 23VU, release and push the FLT CTL/ELAC 1 pushbutton switch.
(6) On the upper ECAM DU, if the F/CTL AIL SERVO FAULT warning stays in view:

do this trouble shooting procedure (Ref. TSM TASK 27-10-00-810-823).

(7) On the panel 23VU, release and push the FLT CTL/ELAC 1 pushbutton switch.
(8) On the upper ECAM DU, if the F/CTL AIL SERVO FAULT warning stays in view:

do this trouble shooting procedure (Ref. TSM TASK 27-10-00-810-824).

(9) On the panel 23VU, release and push the FLT CTL/ELAC 1 pushbutton switch.
(10) On the upper ECAM DU, if the F/CTL AIL SERVO FAULT warning stays in view:

do this trouble shooting procedure (Ref. TSM TASK 27-10-00-810-825).

Subtask 27-93-00-810-190-A

B. With Green hydraulic system pressurized AMM 29-10-00-863-001, on the F/CTL page of the lower ECAM DU, if the R AIL G servocontrol indication is not amber:

replace the SSTU-ROLL CTL, CAPT [4CE1] and SSTU-ROLL CTL, F/O [4CE2] AMM 27-92-41-000-002 and AMM 27-92-41-400-002.

[Rev.8 from Aug 2018] 2026.04.04 04:28:07 UTC