Installation of the Reservoir Pressurization Tubes in the Pylon

TASK 29-14-49-400-803-A
Installation of the Reservoir Pressurization Tubes in the Pylon

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

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.

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

1. Reason for the Job
This procedure is applicable only for the left pylon.
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	WARNING NOTICE(S)
No specific	AR	WRENCH - STANDARD
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06BJB1)	Silicone Sealant-High Temp. - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195BB, 197CB, 197EB, 198CB, 415AL, 415AR, 415BL, 415BR, 415CR, 475AL
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-720-002-A	Functional Test of the Hydraulic Reservoir Pressurization System with the Left Engine
TASK 54-51-21-000-804-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-803-A	Installation of the Pylon Lateral Access-Doors
TASK 54-51-61-400-802-A	Installation of the Thermal Blankets between RIB1 and RIB5
TASK 54-54-00-000-804-A	Removal of the Rear Pylon Fairing (RPF)
TASK 54-54-00-400-803-A	Installation of the Rear Pylon Fairing (RPF)
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Reservoir Pressurization Tubes in the Pylon

3. Job Set-up
Subtask 29-14-49-860-057-A

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).
(2) Make sure that the hydraulic reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that a WARNING NOTICE(S) is in position to tell persons not to pressurize the Green, Blue and Yellow hydraulic systems:

On access door 197CB, on the ground service panel of the Green hydraulic system
On access door 197EB, on the ground service panel of the Blue hydraulic system
On access door 198CB, on the ground service panel of the Yellow hydraulic system.

(4) Make sure that a WARNING NOTICE(S) is in position on the access door 195BB to tell persons not to pressurize the hydraulic reservoirs.

Subtask 29-14-49-941-057-A

B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (ON legend off).
Make sure that the ENG 1(2) BLEED pushbutton switch is released (OFF legend on).
Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.

(3) On the HYD section of panel 40VU:

Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the Green, Blue and Yellow hydraulic systems.

(4) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off.
Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

(5) On the center pedestal, on ENG panel 115VU:

Make sure that the ENG/MODE selector switch is in the NORM position.
Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.

(6) On FLAPS panel 114VU:

Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is in position on the flap/slat control lever.
Make sure that a WARNING NOTICE(S) is in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.

(7) On the HP ground connectors:

Make sure that a WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.

Subtask 29-14-49-010-063-A

C. Close Access
(1) Make sure that the fan cowl doors are closed (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR

Subtask 29-14-49-040-056-A

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 78-30-00-040-807).

Subtask 29-14-49-010-064-A

E. Get Access
(1) Make sure that the thrust-reverser cowl doors are closed (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(2) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the left pylon.
(3) Make sure that the pylon lateral access-doors that follow are removed (Ref. AMM TASK 54-51-21-000-804):
(a) For the left pylon: 415AL 415BL 415AR 415BR 415CR.

Subtask 29-14-49-020-059-A

F. Removal of the Components
(1) Make sure that the rear pylon fairing is removed (Ref. AMM TASK 54-54-00-000-804):
(a) For the left pylon: 475AL.

4. Procedure
Subtask 29-14-49-420-056-A

A. Installation of the Reservoir Pressurization Tubes in the Pylon

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 pressurization tube end-fittings are serviceable.
(4) Installation of the tube (1)
(a) Remove the PLUG-BLANKING from each disconnected line end.
(b) Put the tube (1) in position in the pylon.
(c) Connect the tube (1) to the pylon/wing interface.
(d) Install the clamps (3), the washers (4) and bolts (5) to the tube (1).
(e) Install the clamp (18), the washer (19) and bolt (20) with the clamp (16).
(f) Install the nut (17).
(5) Installation of the tube (2)
(a) Remove the PLUG-BLANKING from each disconnected line end.
(b) Put the tube (2) in position in the pylon.
(c) Make sure that the flanged-bulkhead union of the tube (2) is in position at the pylon lower spar.
(d) At rib (8), connect the tube (2) with the tube (1).
(e) Install the clamps (3), the washers (4) and bolts (5) to the tube (2).
(f) Install the two half-clamp blocks (7) and (9) with the bush (12) to the tube (2).
(g) Put the closing clamp block (13) in position between the two half-clamp blocks (7) and (9).
(h) Make sure that all bushes are correctly installed in the half-clamp blocks (7) and (9).
(i) Install the two half-clamp blocks (7) and (9) to the rib (8).
(j) Install the washers (15) and bolts (14).
(k) Tighten the bolts (14).
(l) Install the washers (10), bolts (11) and self-locking nuts (6).
(m) At rib (8), hold the union of the tube (1) with a WRENCH - STANDARD and TORQUE the coupling nut of the tube (2) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(6) Hold the wing union at the pylon/wing interface with a WRENCH - STANDARD and TORQUE the coupling nut of the tube (1) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(7) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
(8) Tighten the bolts (5), (11), (14), and (20).

5. Close-up
Subtask 29-14-49-410-059-A

A. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(2) Open the thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR

Subtask 29-14-49-420-058-A

B. Connection of the Convoluted Bleed Hose

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) Do an electrical bonding on the lower spar, at the bolts (22) position (Ref. AMM TASK 20-28-00-912-802).
(2) Install the washers (21) and bolts (22) that attaches the tube (2) to the pylon lower spar.
(3) Tighten the bolts (22).
(4) Apply Silicone Sealant-High Temp. - - (Material No.06BJB1) to the bolt ends (22) and to the anchor nuts of the flanged-bulkhead union of the tube (2).
(5) Apply a bead of Silicone Sealant-High Temp. - - (Material No.06BJB1) around the flanged-bulkhead union of the tube (2) at the pylon lower spar.
(6) Install the thermal blankets (Ref. AMM TASK 54-51-61-400-802).
(7) Connect the convoluted bleed hose (23) to the tube (2).
(a) Tighten the coupling nut of the convoluted bleed hose (23) to the tube (2) with your hand.
(b) Install the washer (25), bolt (26) and nut (24).
(c) TORQUE the coupling nut of the convoluted bleed hose (23) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(8) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
(9) Tighten the bolts (26).

Subtask 29-14-49-410-056-A

C. Close Access
(1) Close the thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR

Subtask 29-14-49-720-053-A

D. Test of the Reservoir Pressurization Tube
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Do the functional test of the hydraulic reservoir pressurization system with the left engine (Ref. AMM TASK 29-14-00-720-002).

Subtask 29-14-49-420-057-A

E. Installation of the Components
(1) Install the rear pylon fairing (Ref. AMM TASK 54-54-00-400-803):
(a) For the left pylon: 475AL.
(2) Install the pylon lateral access-doors that follow (Ref. AMM TASK 54-51-21-400-803):
(a) For the left pylon: 415AL 415BL 415AR 415BR 415CR.

Subtask 29-14-49-440-053-A

F. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 29-14-49-410-057-A

G. Close Access
(1) Close access doors 197CB, 197EB, 198CB and 195BB.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 00:25:11 UTC