Check of the Aileron Servo Controls Fluid Reserve Piston Position with the Hydraulic Reservoirs Depressurized

TASK 27-14-00-220-002-A
Check of the Aileron Servo Controls Fluid Reserve Piston Position with the Hydraulic Reservoirs Depressurized

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

1. Reason for the Job
Refer to the MPD TASK: 271400-03
CHECK FLUID RESERVE PISTON POSITION WITH HYDRAULIC RESERVOIR DEPRESSURIZED
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	RULE
No specific	AR	WARNING NOTICE(S)

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

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 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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
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
TASK 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
Aileron Servo Control

3. Job Set-up
Subtask 27-14-00-010-054-A

A. Get access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
(2) Open the access doors 575KB 675KB.

Subtask 27-14-00-860-052-A

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On the center pedestal, make sure that the speedbrake control lever is in the RET position.
(3) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-10-00-863-003).
(4) On each servo control (1), make sure that the indicator of the fluid-reserve (2) piston is in the maximum extended position.

Aileron Servo Control

(5) Depressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001) (Ref. AMM TASK 29-10-00-864-003).
(6) Depressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-001).
(7) Put WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems:

on the ground service panels,
in the cockpit, on the HYD section of the overhead panel 40VU.

(8) Put a warning notice on the access door 195BB to tell persons not to pressurize the hydraulic reservoirs.

4. Procedure
Subtask 27-14-00-220-053-A

A. Check of the Position of the Fluid Reserve Piston of the Aileron Servo Controls
(1) After three hours, on the fluid reserve (2), with a RULE make sure that the indicator does not retract more than 32 mm (1,2598 in.).

If the indicator retracts more than 32 mm (1.2598 in.), the pressure and return line closing valves are not sealed. You must remove the servo control (1) for repair.

5. Close-up
Subtask 27-14-00-410-054-A

A. Close access
(1) Close the access doors 575KB 675KB.
(2) Remove the access platform(s).

Subtask 27-14-00-860-053-A

B. Put the Aircraft Back to its Initial Configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) Pressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:47:25 UTC