Removal of the Reservoir Pressure Switch of the Blue Hydraulic System

TASK 29-34-11-000-002-A
Removal of the Reservoir Pressure Switch of the Blue Hydraulic System

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.

FIN: 2384GH

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	AR	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
197FB

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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
Air Pressure Switch

3. Job Set-up
Subtask 29-34-11-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35
123VU	B HYD/ELEC PUMP	2701GJ	AB09

Subtask 29-34-11-860-054-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 Blue hydraulic system:

In the cockpit on the hydraulic section of the overhead panel,
On the ground service panel of the Blue hydraulic system.

(3) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Depressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(5) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position.
(6) Open the access door 197FB.

4. Procedure
Subtask 29-34-11-020-051-A

A. Removal of the Reservoir Pressure Switch
(1) Disconnect the electrical connector (1) from the pressure switch (2).
(2) Put the PLUG-BLANKING in each disconnected line end.
(3) Remove the nut (4), the washer (6) and the bolt (7) and remove the bonding jumper (5).
(4) Cut and remove the lockwire from the pressure switch (2).
(5) Remove the pressure switch (2) from the reservoir and discard the O-ring (3).
(6) Put a PLUG - BLANKING in the open end of the pressure switch (2) and in the port on the top of the reservoir.

[Rev.10 from 2021] 2026.04.01 00:28:06 UTC