Removal of the Low Level Switch of the Green Hydraulic Reservoir

TASK 29-11-41-000-003-A
Removal of the Low Level Switch of the Green Hydraulic Reservoir

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

ZONE: 147

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 3M (10 FT)- ADJUSTABLE
No specific	1	BAG - PLASTIC
No specific	2	CAP - BLANKING
No specific	1	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	1	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	2	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
147	MAIN GEAR WELL AND HYDRAULIC COMPARTMENT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-680-001-A	Drainage of the Reservoir of the Green Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
Quantity Indicator and Low Level Switch

3. Job Set-up
Subtask 29-11-41-865-057-A

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 29-11-41-860-054-A

B. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system:

in the cockpit on the hydraulic section 40VU of the overhead panel,
on the ground service panel of the Green hydraulic system.

(3) Open the main doors of the main gear (Ref. AMM TASK 32-12-00-010-001).
(4) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(5) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(6) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(7) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the main doors of the main gear.
(8) Drain the reservoir of the Green hydraulic system (Ref. AMM TASK 29-10-00-680-001).
(9) Put a CONTAINER - HYDRAULIC FLUID RESISTANT below the reservoir.

4. Procedure
Subtask 29-11-41-020-053-A

A. Removal of the Low Level Switch
(1) Disconnect the electrical connector (11).
(2) Put a CAP - BLANKING on the disconnected electrical connector (11) and on the receptacle.
(3) Remove the bolts (10) and the washers (9).
(4) Remove the low level switch (8) from the reservoir (1).
(5) Remove and discard the O-ring (7).
(6) Put a PLUG - BLANKING in the port of the reservoir (1).
(7) Put the low level switch (8) into a BAG - PLASTIC to keep it clean.

[Rev.10 from 2021] 2026.04.01 00:15:51 UTC