Replacement of the Clogging Indicator

TASK 29-11-44-960-001-A
Replacement of the Clogging Indicator

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.

ZONE: 148

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	1	CONTAINER 1 L (1/4 USGAL)
No specific	2	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
148	MAIN GEAR WELL AND HYDRAULIC COMPARTMENT

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
7	PACKINGS	AIPC 29-13-44-01-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
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 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A	Depressurize the Green 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 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 29-23-00-860-002-A	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
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 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
LP Filter

3. Job Set-up
Subtask 29-11-44-860-053-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) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system:

in the cockpit on the hydraulic section 40VU of the overhead panel
on the ground service panel of the Green hydraulic system.

(3) Open one of the main doors of the main gear (Ref. AMM TASK 32-12-00-010-001).
(4) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(5) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(6) Disconnect the isolation coupling of the the power transfer unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(7) Put the ACCESS PLATFORM 3M (10 FT) in position.
(8) Put a CONTAINER 1 L (1/4 USGAL) below the filter to collect the unwanted hydraulic fluid.

4. Procedure
Subtask 29-11-44-020-051-A

A. Removal of the Clogging Indicator
(1) Loosen and remove the clogging indicator (5) from the filter head (1).
(2) Remove and discard the packings (7) from the clogging indicator (5).

Subtask 29-11-44-560-051-A

B. Preparation for Installation
(1) Lubricate the new AIPC 29-13-44-01-050 PACKINGS (7) with the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) and install them on the clogging indicator (5).
(2) Lubricate the threads of the clogging indicator (5) with the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .

Subtask 29-11-44-420-051-A

C. Installation of the Clogging Indicator
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Install the new clogging indicator (5) in the filter head (1).

Subtask 29-11-44-790-051-A

D. Test of the Filter Assembly
(1) Remove the WARNING NOTICE(S).
(2) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(3) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001).
(4) Make sure that the clogging indicator stays in.
(5) Make sure that no hydraulic fluid comes out of the filter assembly.
(6) Make sure that the fluid level in the reservoir of the Green hydraulic system is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
(7) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001).

5. Close-up
Subtask 29-11-44-860-054-A

A. Put the aircraft back to the serviceable condition.
(1) Remove the container from below the filter.
(2) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Remove the access platform(s).
(5) Close the main door of the main gear (Ref. AMM TASK 32-12-00-410-001).

[Rev.10 from 2021] 2026.04.01 00:16:23 UTC