Removal of the Low Pressure Filter Assembly

TASK 29-12-44-000-001-A
Removal of the Low Pressure 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.

FIN: 2002GM

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

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - BLANKING
No specific	1	CONTAINER 10 L(2 1/2 USGAL)
No specific	1	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	2	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
197FB

C. Referenced Information

REFERENCE	DESIGNATION
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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
Low Pressure Filter-Assembly

3. Job Set-up
Subtask 29-12-44-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
49VU	HYD/HYD/PRESS/XMTR	1841GN	C11
121VU	HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST	1881GP	N35
123VU	B HYD/ELEC PUMP	2701GJ	AB09

Subtask 29-12-44-860-055-A

B. 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 the warning notices in position to tell persons not to pressurize the Blue hydraulic system:

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

(3) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Depressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(5) Open the access panel 197FB.
(6) Put a CONTAINER 10 L(2 1/2 USGAL) below the low pressure filter-assembly to collect all the hydraulic fluid.

4. Procedure
Subtask 29-12-44-020-052-A

A. Removal of the Low Pressure Filter-Assembly (2002GM)

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.

(1) Disconnect the electrical connector (3) from the temperature transmitter (2).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Loosen the pipe end-fitting (14) and disconnect the pipe (13) from the union (15).
(4) Loosen the pipe end-fitting (11) and disconnect the pipe (12) from the union (10).
(5) Hold the low pressure filter-assembly (8) and remove the four bolts (7) and the four washers (6).
(6) Disconnect the bonding straps:

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).

(a) Disconnect the bonding straps (4) and (5).
(7) Remove the low pressure filter-assembly (8) from the bracket (1).
(8) Put a PLUG - BLANKING on each disconnected pipe end and each open port of the low pressure filter-assembly.

[Rev.10 from 2021] 2026.04.01 00:19:36 UTC