Check of the Aileron Servo Control Oscillations

TASK 27-14-00-200-001-A
Check of the Aileron Servo Control Oscillations

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: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

ZONE: 575
ZONE: 590
ZONE: 675
ZONE: 690
FIN: 33CE1
FIN: 33CE2
FIN: 33CE3
FIN: 33CE4

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
98D27303003001	1	CHECK TOOL (ANALOG)-AILERON,ELEVATOR,RUDDER
98D27303022000	1	TOOL CHECK - DIGITAL, AILERON ELEVATOR RUDDER
98D27903500000	2	PIN-SIDE STICK LOCKING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
575	AFT OUTBD SE OF WING AND TE FIXED STRUCT
590	AILERON
675	AFT OUTBD SE OF WING AND TE FIXED STRUCT
690	AILERON

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 27-14-51-000-003-A	Removal of the Aileron Servo-Control Servovalve
TASK 27-14-51-400-003-A	Installation of the Aileron Servo-Control Servovalve
TASK 29-10-00-863-003-A	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A-01	Pressurize the Blue Hydraulic System with the Blue Electric Pump
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU

3. Job Set-up
Subtask 27-14-00-860-054-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Put the 98D27903500000 PIN-SIDE STICK LOCKING on the CAPT and F/O side sticks.
(3) Put the WARNING NOTICE(S) on the CAPT and F/O side sticks to tell persons not to touch the side sticks.
(4) Make sure that the flap and slat control lever is in the fully retracted position.
(5) On the overhead panel 23VU:

release the FLT CTL/SEC 1 pushbutton switch (on this pushbutton switch the OFF legend comes on).

(6) On the overhead panel 24VU:

release the FLT CTL/SEC 2 pushbutton switch (on this pushbutton switch the OFF legend comes on)
release the FLT CTL/SEC 3 pushbutton switch (on this pushbutton switch the OFF legend comes on).

(7) On the panel 23VU, make sure that the FLT CTL/ELAC 1 pushbutton switch is pushed (on this pushbutton switch, the OFF and FAULT legends are off).
(8) On the panel 24VU, make sure that the FLT CTL/ELAC 2 pushbutton switch is pushed (on this pushbutton switch, the OFF and FAULT legends are off).

Subtask 27-14-00-480-051-A

B. Installation of the Tools
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE at zone 590 (690).
(2) Install the 98D27303003001 CHECK TOOL (ANALOG)-AILERON,ELEVATOR,RUDDER or 98D27303022000 TOOL CHECK - DIGITAL, AILERON ELEVATOR RUDDER on the wing structure, near the aileron.
(3) Put the pointer of the 98D27303003001 CHECK TOOL (ANALOG)-AILERON,ELEVATOR,RUDDER or 98D27303022000 TOOL CHECK - DIGITAL, AILERON ELEVATOR RUDDER at the trailing edge of the aileron.

4. Procedure
Subtask 27-14-00-220-054-A

A. Check of the Oscillation of the Servo Control of Each Aileron
(1) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
(2) On the dial indicator, measure the amplitude of the oscillations.
If the amplitude is more than 1 mm (0.0394 in.), replace the servovalve of the servo control (33CE3, 33CE4).
(3) Pressurize the Green hydraulic system (Ref. AMM TASK 29-23-00-863-001).
(4) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
(5) On the dial indicator, measure the amplitude of the oscillations.
If the amplitude is more than 1 mm (0.0394 in.), replace the servovalve of the servo control (33CE1, 33CE2) (Ref. AMM TASK 27-14-51-000-003) (Ref. AMM TASK 27-14-51-400-003).

5. Close-up
Subtask 27-14-00-080-051-A

A. Removal of the Tools
(1) Remove the 98D27303003001 CHECK TOOL (ANALOG)-AILERON,ELEVATOR,RUDDER or 98D27303022000 TOOL CHECK - DIGITAL, AILERON ELEVATOR RUDDER.
(2) Remove the 98D27903500000 PIN-SIDE STICK LOCKING.

Subtask 27-14-00-860-055-A

B. Put the aircraft back to its initial configuration.
(1) Depressurize the Green hydraulic system (Ref. AMM TASK 29-23-00-864-001).
(2) On the panel 23VU, push the FLT CTL/SEC 1 pushbutton switch (on this pushbutton switch, the OFF legend goes off).
(3) On the panel 24VU, push the FLT CTL/SEC 2 and FLT CTL/SEC 3 pushbutton switches (on these pushbutton switches the OFF legend goes off).
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 27-14-00-942-062-A

C. Remove the maintenance equipement.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 06:46:57 UTC