A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU HYD/HYD PWR/B WARN/& CTL 2702GJ C12 121VU HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST 1881GP N35 123VU B HYD/ELEC PUMP 2701GJ AB09
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B. Aircraft Maintenance Configuration
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES
_______ ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).
(3) On the ECAM control panel on the center pedestal, press the HYD pushbutton.Make sure that the HYD page is shown on the ECAM lower Display Unit (DU).
(4) Make sure that the ECAM does not show any of these conditions:
- low air pressure in the Blue reservoir,
- low fluid level in the Blue reservoir.
(5) If necessary, pressurize the reservoir (Ref. AMM TASK 29-14-00-614-002).
(6) If necessary, add fluid to the reservoir (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(7) On panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B pushbutton switch is set to OFF (ON light not on).
(8) Start one engine (Ref. AMM TASK 71-00-00-710-003).
(9) Look for fault indications on the upper and lower ECAM DU.
4. Fault Isolation
_______________
A. If the fault confirmation gives:
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE
_______ CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
- the message HYD B SYS LO PR on the upper ECAM DU,
- the system name and the flow arrow of the Blue hydraulic system in amber on the lower ECAM DU:
- do a check of the system pressure on the lower ECAM DU and on the system accumulator gage (2072GM).
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CES (1) If the system pressure is more than 1450 psi:
- use the rudder pedals to operate the rudder.
(a) If the rudder operates:
- do a check for continuity between the: the PRESS SW-FLT CTL, B (2151GN) connector A/A and the connector A/C (with the hydraulic system pressurized) (Ref. ASM 29-32/01).
1 If there is continuity:
_
- replace the PRESS SW-FLT CTL, B (2151GN) (Ref. AMM TASK 29-32-12-000-002) and (Ref. AMM TASK 29-32-12-400-002).
2 If there is no continuity:
_
- do a check and repair the wiring between the: the PRESS SW-FLT CTL, B (2151GN) connector A/C and the FWC-1/ FWC-2 connector AA/06G (Ref. ASM 29-32/01) and (Ref. ASM 31-52/02).
(b) If the rudder does not operate:
- do a check for 28 VDC at the: the SOL VALVE-LEAKAGE MEAS, B (2150GP) connector A/A and the connector A/B. (Ref. ASM 29-19/01).
NOTE : There is normally 0 VDC.
____
1 If there is 28 VDC:
_
- do a check of the wiring between: the pushbutton switch (1884GP) connector C2 and the connector C3 (Ref. ASM 29-19/01).
a If there is continuity:
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