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REFERENCE DESIGNATION
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AMM 29-34-11-000-003 Removal of the Reservoir Pressure Switch of the Yellow Hydraulic System AMM 29-34-11-400-003 Installation of the Reservoir Pressure Switch of the
Yellow Hydraulic System
AMM 31-60-00-860-001 EIS Start Procedure
ASM 29-13/01
3. Fault Confirmation
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
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PANEL DESIGNATION IDENT. LOCATION
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121VU HYDRAULIC/Y HYD/PUMP ENG2/MONG 3700GD Q37
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 the panel 40VU.
4. Fault Isolation
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A. If the fault confirmation gives:
- the message HYD Y RSVR LO AIR PRESS on the upper ECAM DU,
- the message LO AIR PRESS on the lower ECAM DU,
- the PTU P/BSW FAULT on panel 40VU,
- the YELLOW ENG 1 PUMP P/BSW FAULT on panel 40VU,
- do a visual check of the pressure shown on the gage of the Yellow reservoir.
(1) If the pressure is more than 25 psi (1.7236 bar):
- do a check of the wiring between: PRESS SW-Y RSVR AIR (3384GH) connector A/A and PRESS SW-Y RSVR AIR (3384GH) connector A/C (Ref. ASM 29-13/01).
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(a) If there is continuity:
- replace the PRESS SW-Y RSVR AIR (3384GH) (Ref. AMM TASK 29-34-11-000-003) (Ref. AMM TASK 29-34-11-400-003).
(b) If there is no continuity:
- make sure that the wiring is not connected to GND between: PRESS SW-Y RSVR AIR (3384GH) connector A/C and DIODE (1156VD) connector 39 (Ref. ASM 29-13/01).
1 If the wiring is connected to GND:
_ - repair the wiring.
(2) If the pressure shown on the gage of the Yellow reservoir is less than 25 psi (1.7236 bar):
- do a check of the clogging indicator on the Reservoir Pressurization Unit (1360GM).
(a) If the clogging indicator is out:
- replace the filter element (Ref. AMM TASK 29-14-41-610-002) .
(b) If the clogging indicator is not out, or the fault continues after replacement of the filter element:
- pressurize the hydraulic reservoirs with a ground cart (Ref. AMM TASK 29-14-00-614-002),
- do a check of the pressure drop on the gage of the hydraulic reservoir.
NOTE : No pressure drop is permitted within 15 minutes at a gage
____ pressure of 50 psi (3.4473 bar)
1 If the air pressure drop is out of limits:
_
- do a check of the VALVE-MAN DEPRESS, Y RSVR (3087GM) for leaks.
a If the VALVE-MAN DEPRESS, Y RSVR (3087GM) has a leak:
_
- replace the VALVE-MAN DEPRESS, Y RSVR (3087GM) (Ref. AMM TASK 29-14-16-000-003) and (Ref. AMM TASK 29-14-16-400-003).
b If the VALVE-MAN DEPRESS, Y RSVR (3087GM) has no leak:
_
- do a check of the VALVE-AIR RELIEF, Y RSVR (3005GM) for leaks.
- If the VALVE-AIR RELIEF, Y RSVR (3005GM) has a leak:
- replace the VALVE-AIR RELIEF, Y RSVR (3005GM) (Ref. AMM TASK 29-14-17-000-003) and (Ref. AMM TASK 29-14-17-400-003).
- If the VALVE-AIR RELIEF, Y RSVR (3005GM) has no leak:
- do a check of the PRESS GAGE-Y RSVR (3383GM) for leaks.
- If the PRESS GAGE-Y RSVR (3383GM) has a leak:
- replace the PRESS GAGE-Y RSVR (3383GM) (Ref. AMM TASK 29-14-15-000-003) and (Ref. AMM TASK 29-14-15-400-003).
- If the PRESS GAGE-Y RSVR (3383GM) has no leak:
「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 217
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