(l)
Slowly open the top charging valve (1).
(m)
At the top charging valve (1), read and record the pressure shown on the pressure gage (20).
(n)
Close the top charging valve (1).
(o)
If the difference in pressure at the top charging valve (1) and the bottom charging valve (3) is less than 11 bar (159.5414 psi), do the steps (a) thru (n) again.
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(18)
Use a thermometer (-45 deg C to 70 deg C (-49 deg F to 158 deg F)) to measure the temperature of the MLG adjacent to the top charging valve (1).
(19)
Use the diagram 2 to find the dimension H for the pressure at the top charging valve (1) at the measured temperature.
(20)
If the measured dimension H is more than you found in diagram 2, do these steps:
(a)
Open the top charging valve (1).
(b)
Slowly open the control valve (23) to release some nitrogen.
(c)
Immediately the shock absorber starts to move, close the control valve (23).
NOTE : The pressure at the top charging valve will decrease
____ because nitrogen was removed without sufficient shock absorber movement.
(d)
After five minutes, measure the temperature and the pressure at the top charging valve (1).
(e)
Use the diagram 2 to find the dimension H needed for the conditions found in step (d).
(f)
Slowly open the control valve (23) to release some nitrogen.
(g)
When the dimension H is the same as you found in step (e) (+/-
2.0 mm (0.0787 in.)) close the control valve (23).
(h)
Close the top charging valve (1).
(21) If the measured dimension H is less than you found in diagram 2, do these steps:
(a)
Connect the nitrogen supply hose (24) to the three-way valve (22) which is connected to the top charging valve (1).
(b)
Open the supply valve on the nitrogen source.
(c)
Open the top charging valve (1).
(d)
Slowly open the control valve (25) to add nitrogen.
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(e) Immediately the shock absorber starts to move, close the control valve (25).
NOTE : The pressure at the top charging valve will increase
____ because nitrogen was added without sufficient shock absorber movement.
(f)
After five minutes, measure the pressure and the temperature at the top charging valve (1).
(g)
Use the diagram 2 to find the dimension H needed for the conditions found in step (f).
(h)
Slowly open the control valve (25) to increase the nitrogen pressure.
(i)
When the dimension H is the same as you found in step (g) (+/-
2.0 mm (0.0787 in.)), close the control valve (25).
(j)
Close the top charging valve (1).
(22)
After five minutes, open the top charging valve (1) and the bottom charging valve (3).
(23)
Read and record:
-
the pressures at the top charging valve (1) and the bottom charging valve (3)
-
the temperature at the top charging valve (1)
-
the dimension H.
(24)
Use the pressure and the temperature you measured at the top charging valve (1) to find the correct dimension H in diagram 2. Make sure that the dimension H in diagram 2 and the dimension H found in step
(23) are the same +/- 2.0 mm (0.0787 in.).
(25)
Check the pressure you measured at the top charging valve (1) and at the bottom charging valve (3). Make sure that the difference between these pressures is more than 11 bar (159.5414 psi).
(26)
If the conditions at step (24) or step (25) are incorrect, do the procedure again from step (17).
(27)
Close the top charging valve (1) and the bottom charging valve (3).
(28)
To get the correct charge pressure at the bottom charging valve, do the applicable step (29) or (30).
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(29)
Refer to the diagram 3. If the pressure at the top charging valve (1) is on or below the graph line (for the measured temperature), do these steps:
(a)
Open the bottom charging valve (3).
(b)
Slowly open the control valve (25) (to increase the nitrogen pressure), or slowly open the control valve (23) (to remove nitrogen).
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本文链接地址：A320飞机维护手册 AMM SERVICING 1(102)
