Installation of the Hydraulic Case Drain-Line from the Pylon to the Green Hydraulic Pump

TASK 29-11-49-400-810-A
Installation of the Hydraulic Case Drain-Line from the Pylon to the Green Hydraulic Pump

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

ZONE: 435

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)
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - STANDARD
No specific	Torque wrench: range to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )
No specific	Torque wrench: range to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft )
No specific	Torque wrench: range to between 3.02 and 2.57 m.daN (22.27 and 18.95 lbf.ft )
No specific	Torque wrench: range to between 3.27 and 3.00 m.daN (24.12 and 22.12 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	LUBRICATING OIL TURBINE ENGINE SYNT BASE
(Material No.CPNCL00122)	Skydrol MCS-352 B

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
435	FAN AND ACCESSORY GEARBOX
195BB, 197CB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
19	O-RING	EIPC 29-11-49-05-070

E. 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 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-11-00-710-001-A	Operational Test of the Green Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 70-24-00-910-814-A	Standard Torque Recommendations
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
Hydraulic Case drain Line from the Pylon to the Green Hydraulic Pump

3. Job Set-up
Subtask 29-11-49-860-147-A

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 29-11-49-941-117-A

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 Green hydraulic system:

On the HYD section of panel 40VU
On access door 197CB, on the ground service panel of the Green 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 Green hydraulic system.
(4) 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.

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

Make sure that the ON legend of the 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).

Subtask 29-11-49-010-140-A

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(2) Make sure that an ACCESS PLATFORM 2M (6 FT) is in position at the engine.

4. Procedure

WARNING: USE PROTECTIVE CLOTHING WHEN YOU USE HYDRAULIC FLUID. HYDRAULIC FLUID CAN CAUSE SKIN IRRITATION.

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.

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.

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

Subtask 29-11-49-910-050-A

A. Preparation for installation
(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.

Subtask 29-11-49-420-135-A

B. Installation of the Drain Fitting (18) on the Green Hydraulic Pump

NOTE: This step is only applicable if the drain fitting (18) was removed to replace the O-ring seal (19). If the O-ring seal (19) and the drain fitting (18) are installed on the hydraulic pump (2), go to Para 4.C.

(1) Remove all the protective covers and caps from the openings, tubes, hoses and connectors.
(2) Install the drain fitting (18) onto the hydraulic pump (2) as follows:
(a) Lubricate the threads of the drain fitting (18) with Skydrol MCS-352 B (Material No.CPNCL00122) .
(b) Apply the Skydrol MCS-352 B (Material No.CPNCL00122) to the new EIPC 29-11-49-05-070 O-RING (19) and install the O-ring seal (19) on the drain fitting (18) on the hydraulic pump (2) side of the drain fitting (18).
(c) Insert the drain fitting (18) into the hydraulic pump (2).
(d) TRIPLE TORQUE the drain fitting (18) on the hydraulic pump (2) to between 3.27 and 3.00 m.daN (24.12 and 22.12 lbf.ft )

(Ref. AMM TASK 70-24-00-910-814).
(3) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Subtask 29-11-49-420-123-A

C. Installation of the Hydraulic Case Drain-Line from the Pylon to the Green Hydraulic Pump
(1) Remove all the protective covers and caps from the openings, tubes, hoses and connectors.
(2) Lubricate the threads of the bolts (5), (8), (15) and (16) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(3) Put the hydraulic tube (3) in position on the engine.
(4) Manually connect the tube nut on the hydraulic tube (3) to the pylon fitting (17).
(5) Attach the hydraulic tube (3) to the engine at four locations as follows:
(a) Loosely install the bolts (5), (8), (15) and (16) and the P-clamps (6), (7), (11) and (13) to attach the hydraulic tube (3) to the four support brackets (9), (10), (12) and (14).
(6) Connect the hydraulic tube (3) to the filter (4) as follows:
(a) Manually connect the tube nut on the hydraulic tube (3) to the filter (4).
(b) Use the WRENCH - STANDARD to hold the fitting on the filter (4).
(c) TRIPLE TORQUE the tube nut on the hydraulic tube (3) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft )

(Ref. AMM TASK 70-24-00-910-814).
(7) TRIPLE TORQUE the tube nut on the hydraulic tube (3) at the pylon fitting (17) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft )

(Ref. AMM TASK 70-24-00-910-814).
(8) TORQUE the bolts (5), (8), (15) and (16) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )

.
(9) Put the hydraulic tube (1) in position on the engine.
(10) Connect the hydraulic tube (1) to the filter (4) follows:
(a) Manually connect the hydraulic tube (1) to the filter (4).
(b) Use the WRENCH - STANDARD to hold the fitting on the filter (4).
(c) TRIPLE TORQUE the tube nut on the hydraulic tube (1) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft )

(Ref. AMM TASK 70-24-00-910-814).
(11) Connect the hydraulic tube (1) to the hydraulic pump (2) as follows:
(a) Manually connect the hydraulic tube (1) to the hydraulic pump (2).
(b) Make sure that the distance between the hydraulic tube (1) and the interphone jack bracket is minimum 13 MM (0.5 IN.).
(c) Use the WRENCH - STANDARD to hold the drain fitting (18) on the hydraulic pump (2).
(d) TRIPLE TORQUE the tube nut on the hydraulic tube (1) to between 3.02 and 2.57 m.daN (22.27 and 18.95 lbf.ft )

(Ref. AMM TASK 70-24-00-910-814).
(12) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Subtask 29-11-49-710-084-A

D. Operational Test
(1) Do the operational test of the Green hydraulic system (Ref. AMM TASK 29-11-00-710-001).
(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 Green reservoir is correct. If necessary, fill the reservoir (Ref. AMM TASK 12-12-29-611-001).

5. Close-up
Subtask 29-11-49-410-108-A

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).

Subtask 29-11-49-410-109-A

B. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(2) Close access doors 197CB and 195BB.
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 08:00:38 UTC