Deactivation of the Aileron Servo Control

TASK 27-14-00-040-001-A
Deactivation of the Aileron Servo Control

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: DO NOT DO THIS DEACTIVATION PROCEDURE IF THERE IS EXTERNAL LEAKAGE ON THE UNSERVICEABLE SERVOCONTROL.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

ZONE: 575
ZONE: 675
FIN: 33CE1
FIN: 33CE2
FIN: 33CE3
FIN: 33CE4

1. Reason for the Job
MMEL 27-14-01A
LEFT AILERON BLUE SERVO-CONTROL (CONTROLLED BY ELAC 1)
MMEL 27-14-02A
LEFT AILERON GREEN SERVO-CONTROL (CONTROLLED BY ELAC 2)
MMEL 27-14-03A
RIGHT AILERON GREEN SERVO-CONTROL (CONTROLLED BY ELAC 1)
MMEL 27-14-04A
RIGHT AILERON BLUE SERVO-CONTROL (CONTROLLED BY ELAC 2)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	TIE WRAP

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
575	AFT OUTBD SE OF WING AND TE FIXED STRUCT
675	AFT OUTBD SE OF WING AND TE FIXED STRUCT
575KB, 675KB, 822

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 27-14-00-710-001-A	Operational Test of the Aileron and Hydraulic Actuation
TASK 27-96-00-740-001-A	BITE Test of the EFCS (Ground Scanning)
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
Deactivation/Reactivation of the Aileron Servocontrol

3. Job Set-up
Subtask 27-14-00-860-057-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Do a ground scanning (Ref. AMM TASK 27-96-00-740-001).

NOTE: If there is only the maintenance messages on:

L OR R PEDALS XDCR UNIT and/or
ELAC 1(2) AIL ORDER DISAGREE.

the deactivation of the aileron servocontrol is not necessary. You can dispatch the aircraft without further maintenance action.

(3) Make sure that the hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-003).

Subtask 27-14-00-010-052-A

B. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position:
(a) at the zone 575 for the left aileron,
(b) at the zone 675 for the right aileron.
(2) Open the access door:
(a) 575KB for the left aileron,
(b) 675KB for the right aileron.
(3) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 822.
(4) Open the access door 822.
(5) On the battery power center 105VU:

loosen the two screws and remove the protective cover.

Subtask 27-14-00-865-057-A

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B11
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B06
** ON A/C ALL
105VU	FLIGHT CONTROLS/ELAC2/STBY SPLY	16CE2	A02
105VU	FLT CTL/ELAC1/STBY SPLY	16CE1	A01
121VU	FLIGHT CONTROLS/ELAC2/NORM/SPLY	15CE2	R20

4. Procedure
Subtask 27-14-00-040-050-A

A. Deactivation of the Aileron Servo Control
(1) Make sure that there are no external leaks from the servo control you deactivate.
(2) Make sure that the pressure and return lines are correctly connected to the parts of the servo control.
(3) Disconnect the electrical connector (1) from the receptacle (2).
(4) Put CAP - BLANKING on the disconnected connector (1) and receptacle (2).
(5) Attach the connector (1) to a pipe with a TIE WRAP.

Subtask 27-14-00-865-058-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B11
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B06
** ON A/C ALL
105VU	FLIGHT CONTROLS/ELAC2/STBY SPLY	16CE2	A02
105VU	FLT CTL/ELAC1/STBY SPLY	16CE1	A01
121VU	FLIGHT CONTROLS/ELAC2/NORM/SPLY	15CE2	R20

Subtask 27-14-00-710-053-A

C. Do the operational test of the ailerons (Ref. AMM TASK 27-14-00-710-001).
(1) Make sure that:

The servocontrol you deactivated does not operate,
The related servocontrol symbol (box) is amber,
The amber F/CTL AILERON SERVO FAULT message is shown on the EWD.

NOTE: For the left(right) Green(Blue) aileron deactivation, when one hydraulic circuit is pressurized, on the EWD, a "F/CTL ELAC X FAULT" message can come into view during the operational test.
You can ignore this message.

5. Close-up
Subtask 27-14-00-860-058-A

A. Put the aircraft back to its initial configuration.
(1) Make an entry in the log-book.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 27-14-00-410-052-A

B. Close Access
(1) Close the access door:
(a) 575KB for the left aileron.
(b) 675KB for the right aileron.
(2) Install the protective cover on the battery power center 105VU.
(3) Tighten the two screws.
(4) Close the access door 822.
(5) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:47:18 UTC