The crew can stop the supply of fluid to the EDP (if there is a fire in the nacelle) by operation of the fire valve 3046GD. The fire valve closes when the ENG 2 FIRE pushbutton is operated. A symbol on the HYD page of the ECAM system display shows if the fire valve is open or closed.
R **ON A/C 059-099, 102-149, 151-199, 201-299, 301-399, 401-499,
Two P/B switches on the overhead panel 40VU control the operation of the Yellow hydraulic system. One P/B switch 3703GD controls the solenoid valve in the EDP. When the P/B switch is operated, the solenoid valve is energized and the EDP is isolated from the HP system. The EDP stays connected to the suction line and keeps an internal pressure which is sufficient for lubrication of the pump.
The second P/B switch 1802GL controls the two PTU solenoid valves (one in the Yellow hydraulic system, one in the Green hydraulic system). On operation of the P/B switch, the two solenoid valves are energized and the PTU is isolated from the two systems. Thus, no transfer of power between the two systems is possible.
The P/B switch 3804GX on the overhead panel 40VU controls the operation of the Yellow electric pump (Ref. 29-24-00).
A P/B switch 1883GP at the rear of the maintenance panel 50VU controls the solenoid valve of the leakage measurement system. This P/B switch is only used for maintenance.
The crew can stop the supply of fluid to the EDP (if there is a fire in the nacelle) by operation of the fire valve 3046GD. The fire valve closes when the ENG 2 FIRE pushbutton is operated. A symbol on the HYD page of the ECAM system display shows if the fire valve is open or closed.
YELLOW MAIN HYDRAULIC POWER - ADJUSTMENT/TEST
_____________________________________________
TASK 29-13-00-710-002
Operational Test of the Yellow Hydraulic System
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-12-29-611-001 Fill the Hydraulic Fluid Reservoir with a Hand Pump 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
the Ground Connector 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure 71-00-00-710-001 Dry Motoring Check
3. Job Set-up
__________
Subtask 29-13-00-865-050
A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/SOL VALVES/G/Y/PTU 1801GL N34 121VU HYDRAULIC/Y HYD/PUMP ENG2/MONG 3700GD Q37 121VU HYDRAULIC/Y HYD/PUMP ENG2/CTL 3701GD Q36
Subtask 29-13-00-860-052
B. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
(2)
Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. TASK 31-60-00-860-001).
(3)
On the ECAM control panel on the center pedestal, press the HYD pushbutton switch P/BSW. Make sure that the HYD page is shown on the lower Display Unit (DU) of the ECAM.
(4)
Make sure that the ECAM does not show any of these conditions;
-
low air pressure in the Yellow reservoir,
-
low fluid level in the Yellow reservoir.
(5)
If necessary, pressurize the reservoir (Ref. TASK 29-14-00-614-002).
(6)
If necessary, add fluid to the reservoir (Ref. TASK 12-12-29-611-001).
(7)
On the overhead panel 40VU, press the PTU/AUTO P/BSW (the OFF light comes on).
(8)
On the overhead panel 40VU, make sure that the YELLOW/ENG 2 PUMP P/BSW is set to on. (FAULT and OFF lights are out).
4. Procedure
_________ Subtask 29-13-00-710-051
A. Operational Test of the Yellow Hydraulic System WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES
_______ ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
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