HYDRAULIC RESERVOIR PRESSURIZING SYSTEM - FAULT ISOLATION PROCEDURES
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TASK 29-14-00-810-801
Fault of the Hydraulic Reservoir Pressurizing System
1. Possible Causes
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- RSVR PRESS UNIT (1360GM)
- air filter element
- outlet non-return valve
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action AMM 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through the Ground Connector AMM 29-14-00-720-001 Functional Test of the Pressurizing System of the
Hydraulic Reservoirs AMM 29-14-41-000-002 Removal of the Reservoir Pressurization Unit (1360GM) AMM 29-14-41-000-003 Removal of the Outlet Non-Return Valve of the
Reservoir Pressurization Unit
AMM 29-14-41-400-002 Installation of the Reservoir Pressurization Unit
(1360GM)
AMM 29-14-41-400-003 Installation of the Outlet Non-Return Valve of the
Reservoir Pressurization Unit
AMM 29-14-41-610-002 Servicing of the Reservoir Pressurization Filter
3. Fault Confirmation
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A. Aircraft Maintenance Configuration
(1) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration. (Ref. AMM TASK 29-00-00-864-001).
(2) Pressurize the hydraulic reservoirs through the ground connector (Ref. AMM TASK 29-14-00-614-002).
(3) Do a visual check of the pressure shown on the gages of the hydraulic reservoirs.
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4. Fault Isolation
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A. If the fault confirmation gives:
- No increase of the air pressure in all three reservoirs:
(1) Do a check of the clogging indicator on the reservoir pressurization unit (1360GM):
(a) If the clogging indicator is out:
- Replace the air filter element of the reservoir pressurization unit 1360GM. (Ref. AMM TASK 29-14-41-610-002).
(2) If the clogging indicator is not out, or the fault continues:
- Replace the outlet non-return valve of the reservoir pressurization unit 1360GM. (Ref. AMM TASK 29-14-41-000-003) and (Ref. AMM TASK 29-14-41-400-003).
(3) If the fault continues:
- Replace the RSVR PRESS UNIT (1360GM). (Ref. AMM TASK 29-14-41-000-002) and (Ref. AMM TASK 29-14-41-400-002).
5. Close-up
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A. Do the functional test of the pressurizing system of the hydraulic reservoirs to make sure that the operation is correct (Ref. AMM TASK 29-14-00-720-001).
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HYDRAULIC RESERVOIR PRESSURIZING SYSTEM - TASK SUPPORTING DATA
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R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
1. System Description
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(Ref. Fig. 301)
**ON A/C 301-399,
1. System Description
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(Ref. Fig. 301A)
**ON A/C ALL
The reservoir pressurization system gets:
- HP air (usual operation)
- LP air (if failure of left engine occurs)
- ground supply air.
A. A restrictor is installed in the HP bleed air line from the left engine. The restrictor limits the airflow to make sure that the temperature of the HP air is reduced to a satisfactory level. It also prevents too much bleed air leakage. This is necessary in case of a leak downstream of the restrictor.
B. The system has a reservoir pressurization unit which controls the pressure of the air supplied to the reservoirs. This is necessary because the pressure of the HP air from the engine can be as much as 26 bar (377 psi) and the system operates at 4.5 bar absolute. The pressure of the LP bleed air is 3.5 bar relative. Thus it is not necessary to decrease the pressure of this air supply. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 液压(79)
