Removal of the Hydraulic Inline Damper

TASK 29-11-46-000-803-A
Removal of the Hydraulic Inline Damper

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: YOU MUST NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. THE HYDRAULIC FLUID IS POISONOUS AND CAN BE ABSORBED INTO YOUR BODY. IF YOU ACCIDENTALLY GET HYDRAULIC FLUID IN YOUR EYES, MOUTH OR ON YOUR SKIN, FLUSH WITH WATER AND GET MEDICAL AID.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

CAUTION: HYDRAULIC FLUID CAN CAUSE DAMAGE TO EQUIPMENT. IF HYDRAULIC FLUID FALLS ON A SURFACE, IMMEDIATELY CLEAN THE SURFACE WITH A CLEAN CLOTH.

ZONE: 450
FIN: 1031GM ** ON A/C NOT FOR ALL

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	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - STANDARD

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU10-0013)	container - 0.25 gal. (1 L)

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
450	ENG 1 THRUST REVERSER & EXHAUST SECTION
195BB, 197CB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 452AR

D. Referenced Information

REFERENCE	DESIGNATION
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 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
Hydraulic Inline Damper

3. Job Set-up
Subtask 29-11-46-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001).
(2) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001).

Subtask 29-11-46-941-052-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (ON legend off).
Put a WARNING NOTICE(S) in position to tell persons not to operate this pushbutton switch.

(2) Open access door 197CB.
(a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system on the ground service panel.
(3) On the HYD section of panel 40VU:

Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.

(4) Open access door 195BB.
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the reservoir of the Green hydraulic system.
(5) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 29-11-46-010-055-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR

Subtask 29-11-46-040-051-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 29-11-46-010-056-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR

4. Procedure
Subtask 29-11-46-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Hydraulic Inline Damper

CAUTION: YOU MUST USE A WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES.

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

(1) Put a PU10-0013container - 0.25 gal. (1 L) below the hydraulic pump connections to collect the remaining fluid.
(2) Remove the hydraulic inline damper (1).
(a) Hold the hydraulic inline damper (1) with a WRENCH - STANDARD and disconnect the hydraulic pressure hose from the hydraulic inline damper (1) on the hydraulic pump.
(b) Collect the hydraulic fluid in the PU10-0013container - 0.25 gal. (1 L).
(c) Remove the hydraulic inline damper (1) from the hydraulic pump.
(d) Remove and discard the packings (2), (4) and two retainers (3) from the hydraulic inline damper (1).
(3) Installation of the protection covers

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Install COVER - PROTECTION on the hydraulic pressure hose and hydraulic pump.

[Rev.10 from 2021] 2026.04.01 13:06:24 UTC