B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 29-00-00-910-002 Safety Procedures of the Hydraulic System 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 29-22-00-869-005 Extension of the Ram Air Turbine (RAT) on the Ground 32-12-00-010-001 Open the Main Gear Doors for Access 29-22-53-991-015 Fig. 406
3. Job Set-up
__________ Subtask 29-22-53-860-089
A. Aircraft Maintenance Configuration
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(1)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
(2)
Put the safety barriers in position.
(3)
Put the warning notice(s) in position to tell persons not to pressurize the Blue hydraulic system:
-in the cockpit on the hydraulic section 40VU of the overhead panel, - on the ground service panel of the Blue hydraulic system.
(4)
Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001).
(5)
Depressurize the reservoir of the Blue hydraulic system (Ref. TASK 29-14-00-614-001).
WARNING : MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU
_______
EXTEND/RETRACT THE RAT.
(6) Extend the Ram Air Turbine (RAT) (Ref. TASK 29-22-00-869-005).
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Subtask 29-22-53-010-063
B. Get Access
(1)
Open the access door 195BB.
(2)
Open the left main gear door (Ref. TASK 32-12-00-010-001).
(3)
Remove the access panel 147BB.
(4)
Remove the access panel 147CB.
(5)
Remove the protective cover from the RAT compartment as follows: (Ref. Fig. 406/TASK 29-22-53-991-015)
(a)
Loosen the screws (2) from the quick-release fasteners (3).
(b)
Remove the screw (5) from the protective cover (1).
(c)
Remove the protective cover (1) from the RAT compartment (4). Subtask 29-22-53-865-085
C.
Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
49VU HYD/RAT/CTL 2801GE D14 106VU CSM/G /EV/MAN/SPLY 6XE B04 121VU HYDRAULIC/RAT/SPLY/EXTN/SOL1 2803GE P33
4. Procedure
_________
(Ref. Fig. 406/TASK 29-22-53-991-015) Subtask 29-22-53-020-063
A. Removal of the Pressure Switch
(1)
Disconnect the electrical connector (9).
(2)
Put protective caps on the disconnected electrical connectors.
(3)
Cut, remove and discard the lockwire from the pressure switch (8).
(4)
Remove the pressure switch (8).
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RAT Pressure Switch
Figure 406/TASK 29-22-53-991-015
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(5)
Remove and discard the packing (7).
(6)
Put a blanking cap in the open port of the ejection jack (6).
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Installation of the Pressure Switch
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______ START A TASK ON OR NEAR:
-
THE FLIGHT CONTROLS
-
THE FLIGHT CONTROL SURFACES
-
THE LANDING GEAR AND THE RELATED DOORS
-COMPONENTS THAT MOVE.
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______ CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
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