Removal of the Engine 2 Hydraulic Low-Pressure Switch Tube

TASK 29-13-49-000-044-A
Removal 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	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - BLANKING
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
447AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-13-17-000-040-A	Removal of the Engine-Pump Pressure Switch
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-13-00-010-040-A	Opening 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 29-13-49-860-063-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) Depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
(3) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:

on the ground service panel 198CB.

(4) Put WARNING NOTICE(S) on the access door 195BB to tell persons not to pressurize the Yellow hydraulic reservoir.

Subtask 29-13-49-941-061-A ** ON A/C NOT FOR ALL

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

put WARNING NOTICE(S) 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) Put WARNING NOTICE(S) 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) Put WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
(6) Put a CONTAINER 5 L (1.32 USGAL) below the lower pressure switch tube to collect the remaining fluid.

Subtask 29-13-49-010-061-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the left fan-cowl door 447AL (Ref. AMM TASK 71-13-00-010-040).
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the engine.

4. Procedure
Subtask 29-13-49-020-059-A ** ON A/C NOT FOR ALL

A. Preparation before the Removal
(1) Remove the hydraulic low-pressure switch (Ref. AMM TASK 29-13-17-000-040).

Subtask 29-13-49-020-058-A ** ON A/C NOT FOR ALL

B. Removal of the Low-Pressure Switch Tube
(1) Disconnect and remove the tube (60) from the hose (55) tee-fitting.
(2) Put COVER - BLANKING on the disconnected tube (60) coupling and the hose (55) tee-fitting.

[Rev.10 from 2021] 2026.04.01 08:07:28 UTC