Installation of the Engine 2 Hydraulic Low-Pressure Switch Tube

TASK 29-13-49-400-044-A
Installation of the Engine 2 Hydraulic Low-Pressure Switch Tube

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.

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 405 and 380 lbf.in (4.58 and 4.29 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195BB, 447AL

C. Referenced Information

REFERENCE	DESIGNATION
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 29-13-17-400-040-A	Installation of the Engine-Pump Pressure Switch
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
Hydraulic Suction Hose/Tube Assembly (PRE SB RA32029-7 and PRE SB RA32029-10)
Engine 2 Hydraulic Tubes

3. Job Set-up
Subtask 29-13-49-860-064-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-10-00-864-002)
(2) Make sure that the Yellow hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:

on the ground service panel 198CB.

(4) Make sure that the WARNING NOTICE(S) is (are) in position on the access door 195BB to tell persons not to pressurize the Yellow hydraulic reservoir.
(5) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the engine 1(2).
(6) Make sure that the fan-cowl door 447AL is open.

Subtask 29-13-49-941-077-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:

make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to start the engine.

(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:

in the cockpit, on the HYD section of the overhead panel 40VU.

(4) On the overhead maintenance panel 50VU:

make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

(5) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to energize the FADEC 1(2).
(6) Make sure that a CONTAINER 5 L (1.32 USGAL) is below the pressure switch tube connection to collect the remaining fluid.

4. Procedure
Subtask 29-13-49-420-066-A ** ON A/C NOT FOR ALL

A. Installation of the Low Pressure Switch tube
(1) Remove the blanking covers from the tube (60) coupling (connection tube side) and the hose (55) tee-fitting.
(2) Connect the tube (60) to the hose (55) tee-fitting.
(3) TORQUE the coupling nut to between 405 and 380 lbf.in (4.58 and 4.29 m.daN )

.
(4) Install the hydraulic low-pressure switch (Ref. AMM TASK 29-13-17-400-040).
(5) Remove the container.

Subtask 29-13-49-710-057-A ** ON A/C NOT FOR ALL

B. Operational test
(1) Do an operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
(2) During the dry motoring, make sure that there are no leaks from the low-pressure switch tube.

5. Close-up
Subtask 29-13-49-410-060-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the WARNING NOTICE(S).
(2) Remove the access platform(s).
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Close the left fan-cowl door 447AL (Ref. AMM TASK 71-13-00-410-040).
(5) Close the door 195BB.

[Rev.10 from 2021] 2026.04.01 00:22:13 UTC