-
engine No. 2 Hydr. pump (Yellow),
-electric pump (Blue),
-PTU,
-electric pump (Yellow).
It also has the RAT hydraulic override switch to deploy the RAT. Panel 50VU has the pushbutton switches which control the three leakage measurement selectors. These are used for servicing only. Also on panel 50VU is the override switch of the Blue electric pump. This switch makes it possible to operate the electric pump of the Blue system when the aircraft is on the ground and the two engines are stopped.
The FIRE pushbutton switches on the overhead panel (section 20VU) control the motorized valves in the suction lines to the engine pumps.
The electrical override switch to deploy the RAT is on panel 21VU.
Hydraulic System Control
Figure 012
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Hydraulic System Indication
Figure 013
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B. Indication
There are two primary types of indication. They are:
-mechanical, which are gages in the hydraulic compartments and wings. These include pressure gages on the system accumulators, air pressure gages on the reservoirs and contents gages on the reservoirs. The content of the three reservoirs is also shown on the reservoir quantity indicator (1834GQ) on the ground service panel of the Green system.
-indications related to the electronic centralized aircraft monitoring (ECAM) system. These are shown on the HYD page of the system display, the engine/warning display and on the overhead panel.
HYDRAULIC POWER - GENERAL - MAINTENANCE PRACTICES
_________________________________________________
TASK 29-00-00-910-002
Safety Procedures of the Hydraulic System
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 HYDRAULIC SYSTEM(S) IN MAINTENANCE IS(ARE)
_______
ISOLATED BEFORE YOU PRESSURIZE THE OTHER HYDRAULIC SYSTEM(S).
R WARNING : DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:_______
R - FLUSH IT AWAY WITH CLEAN WATER
R - GET MEDICAL AID.
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific dry cloth
No specific goggles
No specific ground interphone system
No specific ground power supply
B. Consumable Materials
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
Material No. 11-003 USA ASTM D 740
METHYL-ETHYL-KETONE (Ref. 20-31-00)
3. Job Set-up
__________ Subtask 29-00-00-860-060
A. Hydraulic System Pressurization
(1) Before you pressurize a hydraulic system:
(a)
Make sure that all persons and equipment are clear of the flight controls and the landing gear doors.
(b)
Use only the ground interphone system to get approval to pressurize the hydraulic system.
4. Procedure
_________ Subtask 29-00-00-910-051
A. Hydraulic Fluid Safety Precautions
(1)
Do not mix hydraulic fluid of the phosphate ester type with hydraulic fluid of the mineral-base type. This mixture causes a jelly in the hydraulic systems which can damage the system. This could cause a reduction in aircraft safety. These types of fluid are used in the hydraulic systems and landing gear respectively. Thus there must be precautions to prevent any mixture of the fluids.
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