A. If the test gives: -the message HYD Y ENG 2 PUMP LO PR on the upper ECAM DU, -the LO flag of the Yellow hydraulic system on the HYD page of the lower ECAM DU, -the PTU running indication on the HYD page of the lower ECAM DU,
NOTE : The PRESS SW-Y PUMP, ENG 2 (3074GD) sends a low pressure signal to
____ the ECAM system. This causes the PTU running indication on the lower ECAM DU, although the PTU does not operate (non system failure).
-the Yellow ENG 2 PUMP P/BSW FAULT light on panel 40VU:
- look on the HYD page of the lower ECAM DU and do a check of the pressure of the Yellow system.
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Aug 01/03 CES (1) If the pressure is less than 1667 psi (114.9355 bar):
- do a check on the lower ECAM DU to make sure that the engine pump fire valve 3046GK is not closed.
(a) If the engine pump fire valve is closed:
1 Do a check of the engine pump for a possible cavitation
_ condition (Ref. AMM TASK 29-00-00-280-006).
NOTE : A cavitation condition of the engine pump is possible
____ when the engine pump operates with the engine pump fire valve closed (if you set the ENG 1 (2) FIRE pushbutton on the Eng/APU fire panel), or with the reservoir below the low level (ECAM indication).
2 Push the ENG 2 FIRE P/BSW on panel 1WD (ENG/APU FIRE section
_ on the overhead panel 20VU) to open the engine pump fire valve 3046GK.
(b) If the engine pump fire valve is not closed:
- do a check for 28 VDC between: PUMP-Y, ENG 2 (3030GD) connector A/1 and PUMP-Y, ENG 2 (3030GD) connector A/3 (Ref. ASM 29-13/01).
1 If there is no 28 VDC:
_
a Replace the PUMP-Y, ENG 2 (3030GD) (Ref. AMM TASK 29-13-51-
_ 000-004) and (Ref. AMM TASK 29-13-51-400-004).
b Do a check of the engine pump for a possible cavitation
_ condition (Ref. AMM TASK 29-00-00-280-006).
NOTE : A cavitation condition of the engine pump is
____ possible when the engine pumpoperates with the engine pump fire valve closed (if you set the ENG 1
(2) FIRE pushbutton on the Eng/APU fire panel), or with the reservoir below the low level (ECAM indication).
2 If there is 28 VDC:
_
- replace the ENG 2 PUMP P/BSW (3703GD).
3 If the fault continues:
_
- do a check of the wiring between: PUMP-Y, ENG 2 (3030GD) connector A/3 and CB (3701GD) and repair the wiring as necessary (Ref. ASM 29-13/01).
(2) If the pressure is more than 1812 psi (124.9329 bar)
- do a check for continuity between: the PRESS SW-Y PUMP, ENG 2 (3074GD) connector A/1 and A/3 (Ref. ASM 29-13/01).
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Aug 01/01R CES
(a) If there is continuity:
- replace the PRESS SW-Y PUMP, ENG 2 (3074GD) (Ref. AMM TASK 29-13-17-000-040) and (Ref. AMM TASK 29-13-17-400-040).
(b) If there is no continuity:
- make sure that the wiring is not connected to GND between: PRESS SW-Y PUMP, ENG 2 (3074GD) connector A/1 and the DIODE (1156VD) connector 43 (Ref. ASM 29-13/01).
(c) If the wiring is connected to GND:
- repair the wiring as necessary.
B. Do the test as given in Para. 3. A. to make sure that operation is correct.
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Aug 01/01R
CES
TASK 29-13-00-810-805
Loss of the System Pressure of the Yellow Hydraulic System
1. Possible Causes
_______________
- PRESS SW-FLT CTL, Y (3151GN)
- SOL VALVE-LEAKAGE MEAS, Y (3150GP)
- wiring
- CTL RELAY (3811GX)
- TIME DELAY RELAY (3816GX)
- TIME DELAY RELAY (6MJ)
- pushbutton switch (1883GP)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power
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