(4) Look for fault indications on the upper ECAM DU, the lower ECAM DU and the panel 40VU.

 **ON A/C ALL
 4. Fault Isolation
_______________
 **ON A/C 001-049, 051-061, 101-105, 201-203,

 A. If the fault confirmation gives:
 - the message HYD B RSVR LO AIR PRESS on the upper ECAM DU,

 - the message LO AIR PRESS on the lower ECAM DU,

 - the BLUE ELEC PUMP P/BSW FAULT light on panel 40VU,

 - do a visual check of the pressure shown on the gage of the Blue reservoir.

 「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 ∞∞29-12-00∞∞∞∞∞∞∞∞∞∞Page 203
 Aug 01/05 CES

 (1) If the pressure shown on the gage of the Blue reservoir is more than 45 psi (3.1026 bar): - open and close the CB 2386GH on the panel 121VU,
R - do the operational test of the reservoir low air-pressure warning R of the Blue hydraulic system (Ref. AMM TASK 29-34-00-710-002).
 (a) If the operational test gives the correct results:

 - no further actions are necessary.

 (b) If the operational test does not give the correct results:

 - continue with the procedure given in step (2), (b), 3_, b_ and subsequent.
 (2) If the pressure shown on the gage of the Blue reservoir is less than 45 psi (3.1026 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).
R (b) If the clogging indicator is not out, or the fault continues R after you replace the filter element:
 - pressurize the hydraulic reservoir with a ground cart (Ref. AMM TASK 29-14-00-614-002),

 - do a check of the air pressure drop on the gage of the hydraulic reservoir.

 NOTE : No air pressure drop is permitted within 15 minutes at a
____ gage pressure of 50 psi (3.4473 bar)
R 1_If the air pressure drop is not in the limits:
 - do a check of the VALVE-MAN DEPRESS, B RSVR (2087GM) for leaks.
 a If the VALVE-MAN DEPRESS, B RSVR (2087GM) has a leak:
_

 - replace the VALVE-MAN DEPRESS, B RSVR (2087GM) (Ref. AMM TASK 29-14-16-000-002) and (Ref. AMM TASK 29-14-16-400-002).
 b If the VALVE-MAN DEPRESS, B RSVR (2087GM) has no leak:
_

 - do a check of the VALVE-AIR RELIEF, B RSVR (2005GM) for leaks.

 - If the VALVE-AIR RELIEF, B RSVR (2005GM) has a leak:

 - replace the VALVE-AIR RELIEF, B RSVR (2005GM) (Ref. AMM TASK 29-14-17-000-001) and (Ref. AMM TASK 29-14-17-400-001).

 - If the VALVE-AIR RELIEF, B RSVR (2005GM) has no leak:

 - do a check of the PRESS GAGE-B RSVR (2383GM) for leaks.

 - If the PRESS GAGE-B RSVR (2383GM) has a leak:

 - replace the PRESS GAGE-B RSVR (2383GM) (Ref. AMM TASK 29-14-15-000-002) and (Ref. AMM TASK 29-14-15-400-002).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-061, 101-105, 201-203, ∞∞29-12-00∞∞∞∞∞∞∞∞∞∞Page 204
 May 01/05 CES

 - If the PRESS GAGE-B RSVR (2383GM) has no leak: 
R  - do a check of all the connections and components on the 
R  reservoir for leaks.
 - If you find a leak:
 - tighten the related nut or replace the defective
 component.
 c If the fault continues:_ 
R  - replace the CHECK VALVE-RSVR PRESS, B (2388GM) (Ref. AMM 
R  TASK 29-14-18-000-001) and (Ref. AMM TASK 29-14-18-400-
R  001). 
R  d If the fault continues:_ 
R  - replace the RSVR PRESS UNIT (1360GM) (Ref. AMM TASK 29-
R  14-41-000-002) and (Ref. AMM TASK 29-14-41-400-002).
 2_ If the air pressure drop is in the limits:
 a Depressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-_
 00-614-001).
 b Pressurize the reservoir pressurization system with the_
 left engine (Ref. AMM TASK 29-14-00-720-002), or
 c Connect an external pressure source:_
 - disconnect the reservoir pressurization hose (1674GM)
 from the HP bleed-air port of the left engine (Ref. AMM
 TASK 29-14-49-000-001)
 - connect an approved air or nitrogen inflation adaptor to
 the line end fitting of the reservoir pressurization hose
 (1674GM)
 - pressurize the reservoir pressurization system to
 approximately 15.2 bar (220 psi).
　
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