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 (d) If the internal leakage is too much, do the checks of sections of the system to find the cause.
 (2) Measurement of the Yellow system (central section) internal leakage 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 (Ref. Fig. 609/TASK 29-00-00-991-009) 
R  **ON A/C 401-499, 
R  (Ref. Fig. 609A/TASK 29-00-00-991-009-A) 
R  **ON A/C ALL
 (a) On the ECAM control panel on the center pedestal, push the HYD P/B. Make sure that the lower DU shows the HYD page.
 (b) On the overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/Y P/BSW to off (the OFF light comes on).
 (c) On the overhead panel 40VU, make sure that the PTU P/BSW is set to OFF (the OFF light is on).
 (d) Refer to the lower DU to make sure that the solenoid valve operation is correct (the color of the flow arrow and system name of the Yellow system is amber).
 (e) In the Yellow system compartment, make sure that the three valves on the leakage measurement selector valve are set to OFF.
 (f) Monitor the flow shown on the ground supply flow meter. It must not be more than 2.9 l.min (0.7660 USgal.mn).
 (3) Measurement of the Yellow system (rear section) internal leakage 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 (Ref. Fig. 610/TASK 29-00-00-991-010)

 

 Yellow Hydraulic System - Central Section
 Figure 609/TASK 29-00-00-991-009

R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 29-00-00Page 655 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1

R  Yellow Hydraulic System - Central Section 
R  Figure 609A/TASK 29-00-00-991-009-A 
R 1EFF :  401-499,  1  29-00-00 Page 656 
1  1  Aug 01/05
 1  1
 1CES  1

 

 Yellow Hydraulic System - Rear Section
 Figure 610/TASK 29-00-00-991-010

R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 29-00-00Page 657 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1

R  **ON A/C 401-499, 
R  (Ref. Fig. 610A/TASK 29-00-00-991-010-A) 
R  **ON A/C ALL
 (a) On the overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/Y P/BSW is set to off (OFF light is on).
 (b) On the overhead panel 40VU, make sure that the PTU P/BSW is set to OFF (the OFF light is on).
 (c) In the Yellow system compartment, turn the REAR manual selector valve to the ON position.
 (d) Monitor the flow shown on the ground supply flowmeter. It must not be more than 8.7 l.min (2.2982 USgal.mn).
 (e) In the Yellow system compartment, turn the REAR manual selector to the OFF position.
 (4) Measurement of the Yellow system (left wing section) internal leakage 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 (Ref. Fig. 611/TASK 29-00-00-991-011) 
R  **ON A/C 401-499, 
R  (Ref. Fig. 611A/TASK 29-00-00-991-011-A) 
R  **ON A/C ALL
 (a) On the overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/Y P/BSW is set to off (the OFF light is on).
 (b) On the overhead panel 40VU, make sure that the PTU P/BSW is set to OFF (the OFF light is on).

 

R  Yellow Hydraulic System - Rear Section 
R  Figure 610A/TASK 29-00-00-991-010-A 
R 1EFF :  401-499,  1  29-00-00 Page 659 
1  1  Aug 01/05
 1  1
 1CES  1

 

 Yellow Hydraulic System - Left Wing Section
 Figure 611/TASK 29-00-00-991-011

R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 29-00-00Page 660 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1R Yellow Hydraulic System - Left Wing Section R Figure 611A/TASK 29-00-00-991-011-A

R 1EFF : 401-499, 1 29-00-00Page 661 1 1 Aug 01/05 1 1 1CES 1

 (c) In the Yellow system compartment, turn the LH WING manual selector valve to the ON position.
 (d) Monitor the flow shown on the ground supply flowmeter. It must not be more than 4.9 l.min (1.2944 USgal.mn).
 (e) In the Yellow system compartment, turn the LH WING manual selector valve to the OFF position.
 (5) Measurement of the Yellow system (right wing section) internal leakage 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 (Ref. Fig. 612/TASK 29-00-00-991-012) 
R  **ON A/C 401-499, 
R  (Ref. Fig. 612A/TASK 29-00-00-991-012-A) 
R  **ON A/C ALL
 (a) On the overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/Y P/BSW is set to off (the OFF light is on).
　
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