YELLOW MAIN HYDRAULIC POWER - FAULT ISOLATION PROCEDURES
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TASK 29-13-00-810-801
Loss of the Correct Quantity in the Yellow Hydraulic Reservoir
1. Possible Causes
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- SDAC-1 (1WV1)
- SDAC-2 (1WV2)
- LOW LEVEL SWITCH
- wiring
- QUANTITY INDICATOR - TRANSMITTER
- hydraulic lines
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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31-54-00-810-835 Loss of the YELLOW RSVR QTY Input of the SDAC 1 31-54-00-810-836 Loss of the YELLOW RSVR QTY Input of the SDAC 2 AMM 12-32-28-281-001 Drain Water Content AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power AMM 29-00-00-280-003 Check of the Internal Leakage of the Yellow Hydraulic System
AMM 29-00-00-280-006 Check of the Green or Yellow Hydraulic System after Operation in a Possible Cavitation Condition of the Engine Pump
R AMM 29-00-00-790-001 Check of the External Leaks of the Hydraulic
R Components AMM 29-13-41-000-003 Removal of the Quantity Indicator of the Yellow Hydraulic Reservoir AMM 29-13-41-000-004 Removal of the Low Level Switch of the Yellow Hydraulic Reservoir AMM 29-13-41-400-003 Installation of the Quantity Indicator of the Yellow Hydraulic Reservoir AMM 29-13-41-400-004 Installation of the Low Level Switch of the Yellow Hydraulic Reservoir AMM 29-31-00-710-001 Operational Test of the Fluid Low-Level Warning-System AMM 31-60-00-860-001 EIS Start Procedure ASM 29-13/01 ASM 29-31/01 ASM 29-31/02
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞29-13-00∞∞∞∞∞∞∞∞∞∞Page 201
Feb 01/02 CES
3. Fault Confirmation
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A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/LOW/LVL/IND 1832GQ N32 121VU HYDRAULIC/HYD/QTY/IND 1831GQ P35 121VU HYDRAULIC/G HYD/PUMP ENG1/MONG 1702GK R34
B. Aircraft Maintenance Configuration
(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, push the HYD pushbutton switch. Make sure that the HYD page is shown on the system display of the ECAM.
(4) Look for fault indications on the upper ECAM DU, the lower ECAM DU and panel 40VU.
4. Fault Isolation
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A. If the Fault Confirmation gives:
-the message HYD Y RSVR LO LVL on the upper ECAM DU,
-the contents indication (shows low-fluid level) on the lower ECAM DU in
amber,
-the PTU P/BSW FAULT on panel 40VU,
-the YELLOW ENG 2 PUMP P/BSW FAULT on panel 40VU:
Do a visual check of the quantity shown on the mechanical indicator of
the Yellow reservoir.
R (1) If the quantity shown is more than or equal to 3.5 l (0.9245 USgal):
- do a check for 28 VDC between: LOW LEVEL SWITCH connector B/A and connector B/C (Ref. ASM 29-31/02).
(a) If there is no 28 VDC:
- do a check of the wiring between: LOW LEVEL SWITCH connector B/C and CB (1832GQ) and repair the wiring as necessary (Ref. ASM 29-31/02).
(b) If there is 28VDC:
- replace the LOW LEVEL SWITCH (Ref. AMM TASK 29-13-41-000-004) and (Ref. AMM TASK 29-13-41-400-004).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞29-13-00∞∞∞∞∞∞∞∞∞∞Page 202
Feb 01/02 CES (c) If the fault continues:
- make sure that the wiring is not connected to GND between: LOW LEVEL SWITCH connector B/B and DIODE (1156VD) connector 37 (Ref. ASM 29-13/01) and (Ref. ASM 29-31/02).
1 If the wiring is connected to GND:
_ - repair the wiring as necessary.
R (d) If the fault continues:
R - replace the QUANTITY INDICATOR - TRANSMITTER (Ref. AMM TASK 29-R 13-41-000-003) and (Ref. AMM TASK 29-13-41-400-003).
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