Removal of the Filters of the Valve Blocks

TASK 27-54-53-000-003-A
Removal of the Filters of the Valve Blocks

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.

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.

NOTE: The removal procedure for the filter of the valve block 24CV is specified. The removal procedure for the filter of the valve block 23CV is almost the same. If there are differences in the procedures they are specified.

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 3M (10 FT)
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Referenced Information

REFERENCE	DESIGNATION
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
Filter

3. Job Set-up
Subtask 27-54-53-865-056-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B02
** ON A/C ALL
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21

Subtask 27-54-53-010-052-A

B. Open the main doors of the main gear (Ref. AMM TASK 32-12-00-010-001).

Subtask 27-54-53-860-052-A

C. Aircraft Maintenance Configuration
(1) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-480-002) on the slat/flap control lever.
(2) Put the ACCESS PLATFORM 3M (10 FT) in position at the opening of the main gear main door.
(3) Make sure that the Green and the Yellow hydraulic systems are depressurized and put them in the maintenance configuration. (Ref. AMM TASK 29-00-00-864-001).
(4) Depressurize the reservoirs of the Green and the Yellow hydraulic systems (Ref. AMM TASK 29-14-00-614-001).
(5) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.
(6) Put a CONTAINER 5 L (1.32 USGAL) in position below the valve block (1).

4. Procedure
Subtask 27-54-53-020-052-A

A. Removal of the Filter
(1) Cut, remove and discard the lockwire.
(2) Remove the filter (3) from the valve block (1).
(3) Remove and discard the O-ring (2) from the filter (3).

[Rev.10 from 2021] 2026.03.31 23:54:24 UTC