6. Operation_________
The operation of the ground internal leak test system in each system is the same.
A. During Flight
During flight, the solenoid valve is open (de-energized) and the 2/2-way valves in the ground leakage-measurement manifold are closed. Inlet port A of the ground leakage-measurement manifold gets HP fluid through the solenoid valve. The fluid divides into three flows. Each flow goes through the applicable check valve to the outlet port of the applicable 2/2-way valve (closed). It then leaves the ground leakage-measurement manifold through the applicable outlet port (C, D or E) to supply the related systems.
Fluid also goes into the ground leakage-measurement through inlet port B. The fluid divides into three flows. Each flow goes to the inlet port of the applicable 2/2-way valve. The valve is closed and the flow of fluid stops.
B. During Ground Maintenance Tasks
During ground operation of the system, the applicable pushbutton switch on the maintenance panel (50VU) is set to close the related solenoid valve. This means that the HP inlet port is closed and the HP supply port is connected to LP return. No HP fluid goes to inlet port A of the ground leakage-measurement manifold.
A ground test rig and flow meter, connected to the applicable ground service panel supply HP fluid to the system. The HP fluid goes through the HP manifold to inlet port B of the ground leakage-measurement manifold. The HP fluid divides into three flows and goes to the inlet ports of the three 2/2-way valves. It then goes through the valve which has been opened to supply the applicable part of the aircraft.
1EFF : ALL 1 29-19-00Page 15 1 1 Feb 01/02R 1 1 1CES 1
MANIFOLD - GROUND LEAKAGE MEASUREMENT (1146GM,2146GM,3146GM)
____________________________________________________________ REMOVAL/INSTALLATION
____________________
TASK 29-19-41-000-001
Removal of the Ground Leakage-Measurement Manifold (1146GM) of the Green Hydraulic System
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific blanking plugs
No specific circuit breaker(s) safety clip(s)
No specific warning notices
No specific container 2.0 l (0.5283 USgal)
No specific access platform 2.8 m (9 ft. 2 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 29-00-00-910-002 Safety Procedures of the Hydraulic System 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 29-23-00-860-001 Disconnection of the Isolation Coupling of the Power
Transfer Unit (PTU) 32-12-00-010-001 Open the Main Gear Doors for Access 29-19-41-991-001 Fig. 401
3. Job Set-up
__________ Subtask 29-19-41-865-050
A. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST 1881GP N35 121VU HYDRAULIC/G HYD/PUMP ENG1/CTL 1701GK R35 121VU HYDRAULIC/G HYD/PUMP ENG1/MONG 1702GK R34
Subtask 29-19-41-941-050
B. Put the warning notices in position to tell persons not to pressurize the Green hydraulic system:
-in the cockpit on the hydraulic section 40VU of the overhead panel, - on the ground service panel of the Green hydraulic system.
Subtask 29-19-41-860-052
C. Aircraft Maintenance Configuration
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(1)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
(2)
Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001).
(3)
Depressurize the reservoir of the Green hydraulic system. (Ref. TASK 29-14-00-614-001).
(4) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM HYDRAULIC POWER 液压5(68)
