Green Hydraulic System - Left Wing Section
Figure 603/TASK 29-00-00-991-003
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Green Hydraulic System - Right Wing Section
Figure 604/TASK 29-00-00-991-004
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R (Ref. Fig. 604A/TASK 29-00-00-991-004-A)
R **ON A/C ALL
(a)
On the overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/G P/BSW is set to off (OFF light 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 main gear compartment, turn the RH WING manual selector valve to the ON position.
(d)
Monitor the flow shown on the ground supply flowmeter. It must not be more than 3.7 l.min (0.9774 USgal.mn).
(e)
In the main gear compartment, turn the RH WING manual selector valve to the OFF position.
(6) Permitted leakage rates of the components
(a) The maximum permitted internal leakage for components related to the Green hydraulic system is: Aileron servocontrol: 1.5 l.min (0.3962 USgal.mn) Spoiler 5: 1.5 l.min (0.3962 USgal.mn) THS actuator servovalve: 0.75 l.min (0.1981 USgal.mn) Elevator servocontrol: 1.5 l.min (0.3962 USgal.mn) Rudder servocontrol: 2.1 l.min (0.5547 USgal.mn) Yaw damper actuator: 1.3 l.min (0.3434 USgal.mn) Flap PCU valve block: 0.2 l.min (0.0528 USgal.mn) Slat PCU valve block: 0.2 l.min (0.0528 USgal.mn)
NOTE : The maximum leakage rates for components are given only to
____ assist in trouble shooting. The total leakage of components in a section (left wing, right wing etc) of the system must be less than the permitted maximum for that section. Also, the total leakages of the sections must not together be more than the leakage permitted for the complete system.
R Green Hydraulic System - Right Wing Section R Figure 604A/TASK 29-00-00-991-004-A
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(b) If the internal leakage rate is too high you can find the defective component if you:
1 Listen to the pipes and components which may be the cause.
_
2 Feel the pipes and components, a high leakage rate will cause
_
an increase in their temperature.
CAUTION : DO NOT DISCONNECT AND CAP THE RETURN LINE FROM A
_______ SERVOCONTROL TO DO A LEAKAGE CHECK. IF A SUPPLY OF SYSTEM PRESSURE GETS TO THE SERVOCONTROL IT CAN CAUSE DAMAGE IF THERE IS NO RETURN FLOW.
(c) If you think that a servocontrol is the cause, disconnect and cap the supply to the servocontrol. Do the test again and if the leakage rate is now in limits, the servocontrol is the defective component.
(7) If the check is satifactory, do the steps that follw:
(a)
Open, safety and tag this(these) circuit breaker(s): 1GA, 2GA, 52GA, 1701GK, 1702GK
(b)
Remove the blanking plug from the electrical connector 49GA-A.
(c)
Connect the electrical connector 49GA-A to the safety valve 49GA.
Subtask 29-00-00-865-080
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/LGCIU/SYS1/NORM 1GA C09 121VU HYDRAULIC/LGCIU/SYS2 2GA Q35 121VU HYDRAULIC/LGCIU/SYS1/GRND SPLY 52GA Q34 121VU HYDRAULIC/G HYD/PUMP ENG1/CTL 1701GK R35 121VU HYDRAULIC/G HYD/PUMP ENG1/MONG 1702GK R34
Subtask 29-00-00-710-058
C. Test
(1) Do an Operational Check to make sure that the safety valve closes at 260 kts (Ref. TASK 32-31-00-710-005).
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