Installation of the Case Drain Filter-Assembly

TASK 29-12-43-400-801-A
Installation of the Case Drain Filter-Assembly

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.

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: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 195
FIN: 2084GM

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	SCRAPER - NON METALLIC
No specific	Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )
No specific	Torque wrench: range to between 3.3 and 3.0 m.daN (24.34 and 22.12 lbf.ft )
No specific	Torque wrench: range to between 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195	HYDRAULIC COMPT AND FAIRINGS
195BB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
15	PACKING	AIPC 29-12-03-08-065
6	PACKING	AIPC 29-12-03-08-070
7	PACKING	AIPC 29-12-03-08-070

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-00-00-910-003-A	General Removal and Installation Procedure of the Check Valves in the Hydraulic Systems
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 29-12-43-960-001-A	Replacement of the Clogging Indicator
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)
Case Drain Filter-Assembly

3. Job Set-up
Subtask 29-12-43-860-056-A

A. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the warning notices are in position to tell persons not to pressurize the Blue hydraulic system:

One WARNING NOTICE(S) in the cockpit on hydraulic section 40VU of the overhead panel
One WARNING NOTICE(S) on the ground service panel of the Blue hydraulic system.

(3) Make sure that the Blue hydraulic system is depressurized.
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the reservoir of the Blue hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position.
(6) Make sure that access door 195BB is open.
(7) Make sure that the CONTAINER - HYDRAULIC FLUID RESISTANT is in position below the case drain filter-assembly.

4. Procedure
Subtask 29-12-43-420-052-C

A. Installation of the Case Drain Filter-Assembly

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.

CAUTION: YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.

(1) Remove the sealants with a SCRAPER - NON METALLIC from:

The mating surface of the case drain filter-assembly (2)
The bracket (1).

(2) Examine the bracket (1) for cracks, corrosion or other damage.
(3) Apply a layer of the Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) to the mating surface of the case drain filter-assembly (2).
(4) Put the case drain filter (2) in position on the bracket (1).
(5) Install the bolts (10) with the washers (9).
(6) Remove the blanking plugs from the ports of the case drain filter-assembly (2).
(7) If removed, install the removed components on the replacement case drain filter-assembly (2) as follows:
(a) Remove the blanking plugs from the removed components.
(b) Install the clogging indicator (16) (Ref. AMM TASK 29-12-43-960-001).
(c) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the new packings (6), (7) and (15).
(d) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the unions (3) and (8).
(e) Install the union (3) as follows:
1 Put the new AIPC 29-12-03-08-070 PACKING (6) in position on the union (3).
2 Install the union (3) in the case drain filter-assembly (2).
3 TORQUE the union (3) to between 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft )

.
(f) Install the union (8) as follows:
1 Put the new AIPC 29-12-03-08-070 PACKING (7) in position on the union (8).
2 Install the union (8) in the case drain filter-assembly (2).
3 TORQUE the union (8) to between 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft )

.
(g) Install the check valve (5) as follows:
1 Put the new AIPC 29-12-03-08-065 PACKING (15) in position on the check valve (5).
2 Install the check valve (5) in the case drain filter-assembly (2) (Ref. AMM TASK 29-00-00-910-003).
(8) Remove the blanking plugs from the pipe end.
(9) Make sure that the hydraulic line end-fittings are serviceable.
(10) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the pipe end-fittings (11) and (13).
(11) Connect the pipe (12) to the union (3).
(12) TORQUE the pipe end-fitting (11) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(13) Remove the blanking plug from the port.
(14) Connect the pipe (14) to the check valve (5) and the structure.
(15) TORQUE the pipe end-fittings (13) to between 3.3 and 3.0 m.daN (24.34 and 22.12 lbf.ft )

.
(16) Mark the tightened union and the pipe end-fittings with a red line (Ref. AMM TASK 20-23-22-910-001).

Subtask 29-12-43-710-050-A

B. Test
(1) Pressurize the Blue hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).

WARNING: BE VERY CAREFUL WHEN YOU DO THE CHECKS IN THIS PROCEDURE. IF THE COMPONENT IS DEFECTIVE, THERE CAN BE IMPORTANT LEAKAGE AT THE PORT. HYDRAULIC FLUID WILL THUS SPRAY OUT AT HIGH PRESSURE. THIS WILL CAUSE INJURY TO YOU AND DAMAGE TO EQUIPMENT.

(3) Examine the connections of the case drain filter-assembly (2) and make sure that there are no leaks.

NOTE: Leaks are not permitted.

(4) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).

5. Close-up
Subtask 29-12-43-860-057-A

A. Put the aircraft back to the serviceable condition.
(1) Remove the container from below the case drain filter-assembly.
(2) Remove the WARNING NOTICE(S).

Subtask 29-12-43-410-052-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close access door 195BB.

[Rev.10 from 2021] 2026.04.01 00:19:32 UTC