Installation of the Self-Sealing Coupling

TASK 29-13-36-400-802-A
Installation of the Self-Sealing Coupling

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.

CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

ZONE: 423
FIN: 3060GM ** 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	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - PROTECTION
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )
No specific	Torque wrench: range to between 15.7 and 14.7 m.daN (115.78 and 108.41 lbf.ft )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
423	UPPER FWD PYLON
195BB, 198CB
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-13-00-710-002-A	Operational Test of the Yellow 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 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Self-Sealing Coupling (3060GM)
Disconnection of the Hydraulic Suction Assembly

3. Job Set-up
Subtask 29-13-36-860-056-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-10-00-864-002)
(2) Make sure that the reservoir of the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-14-00-614-001)

Subtask 29-13-36-941-056-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 (the ON legend is off).
Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate this pushbutton switch.

(2) Make sure that a WARNING NOTICE(S) is in position to tell persons not to pressurize the Yellow hydraulic system:

On the HYD section of panel 40VU
On access door 198CB, on the ground-service panel of the Yellow hydraulic system.

(3) Make sure that a WARNING NOTICE(S) is in position on access door 195BB to tell persons not to pressurize the reservoir of the Yellow hydraulic system.
(4) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 29-13-36-010-053-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 29-13-36-040-051-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser System 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) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 29-13-36-010-055-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
(2) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

4. Procedure
Subtask 29-13-36-420-053-A ** ON A/C NOT FOR ALL

A. Installation of the Self-Sealing Coupling

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the hydraulic line end-fittings are serviceable.
(4) Make sure that a CONTAINER 5 L (1.32 USGAL) is in position below the hydraulic connections.
(5) Remove the blanking plugs from the pipe (6), the pressure hose (3) and the self-sealing coupling (2).
(6) Install the self-sealing coupling (2) on the pylon fuel-hydraulic panel (1).
(7) Install the washers (5) and screws (4).
(8) Tighten the screws (4).
(9) Connect the coupling nut of the pipe (6) to the self-sealing coupling (2).
(10) TORQUE the coupling nut of the pipe (6) to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )

.
(11) Install the pressure hose (3) to the self-sealing coupling (2).
(12) TORQUE the coupling nut of the pressure hose (3) to between 15.7 and 14.7 m.daN (115.78 and 108.41 lbf.ft )

.
(13) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Subtask 29-13-36-420-055-A ** ON A/C NOT FOR ALL

B. Connection of the Hydraulic Suction Assembly

Disconnection of the Hydraulic Suction Assembly ** ON A/C NOT FOR ALL

(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) Turn and move the pipe (1) up until its coupling nut is in front of the hole on the pylon fuel-hydraulic panel (2).
(3) Remove the CAP - PROTECTION from the hydraulic suction assembly (5).
(4) Put the hydraulic suction assembly (5) in position on the pylon fuel-hydraulic panel (2).
(5) Install the washers (3) and screws (4).
(6) Tighten the screws (4).
(7) Connect the coupling nut of the pipe (1) to the hydraulic suction assembly (5).
(8) TORQUE the coupling nut of the pipe (1) to the hydraulic suction assembly (5) to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )

.
(9) TORQUE the coupling nut of the pipe (1) on the pylon side to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )

.
(10) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Subtask 29-13-36-710-052-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do the operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002)
(2) After the dry-motoring, make sure that there were no leaks from the hydraulic connections.
(3) Make sure that the level of the hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the hydraulic reservoir (Ref. AMM TASK 12-12-29-611-001).

5. Close-up
Subtask 29-13-36-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the container.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).
(4) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

Subtask 29-13-36-440-050-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 29-13-36-410-053-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Close access doors 198CB and 195BB.
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 00:20:33 UTC