- replace the RELIEF VALVE-BRK SYS, Y (3067GM) (Ref. AMM TASK 32-44-15-000-001) (Ref. AMM TASK 32-44-15-400-001).
(b) If leakage is in the permitted tolerances: - operate the manual depressurization pushbutton of the relief valve (3067GM) to release the accumulator pressure.
- on the Yellow hydraulic system, depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
- connect the line at port D.
(3) Do a check for leakage of the Alternate-brake distribution dual-valve (2577GM): - on the brake manifold (3016GM) remove the caps and connect the
lines at ports E, F and G. - on the brake distribution dual-valve (2577GM) disconnect the line at port B and install a plug on the disconnected hydraulic line.
- use the Yellow electric pump to pressurize the Yellow brake accumulator (2582GM) to 206 bars (2988 psi) and stop the pump. In the cockpit, make sure that the PARKING BRK control switch is at OFF.
- on the brake distribution dual-valve (2577GM) do a check for leakage at port B.
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(a) if leakage is more than:
-------------------------------------------------| Tamb | Limit | |------------------------|----------------------| | 70 >Tamb> 60 deg.c | 102 cm3/mn | |(158 >Tamb > 140 deg.F) | ( 6.22 in.3/mn) | |------------------------|----------------------| | 60 >Tamb> 40 deg.C | 80 cm3/mn | |(140 >Tamb> 104 deg.F) | (4.88 in.3/mn) | |-----------------------------------------------| | 40 >Tamb> 20 deg.C | 50 cm3/mn | |(104 >Tamb > 68 deg.F) | (3.05 in.3/mn) | |------------------------|----------------------| | 20 >Tamb> 0 deg.C | 30 cm3/mn | |(68 >Tamb> 32 deg.F) | (1.83 in.3/mn) | |------------------------|----------------------| | 0 >Tamb> -10 deg.C | 14.4 cm3/mn | | (32 >Tamb> 14 deg.F) | (0.88 in.3/mn) | |------------------------|----------------------| | -10 >Tamb> -40 deg.C | 10 cm3/mn | | (14 >Tamb> -40 deg.F) | (0.61 in.3/mn) | |------------------------|----------------------|
- replace the DUAL VALVE-ALTN BRK DISTR (2577GM) (Ref. AMM TASK 32-43-14-000-001) (Ref. AMM TASK 32-43-14-400-001).
(b) If leakage is in the permitted tolerances: - operate the manual depressurization pushbutton of the relief valve (3067GM) to release the accumulator pressure.
- on the Yellow hydraulic system, depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
- connect the line at port B.
(4) Do a check of the automatic selector (2576GM): - on the automatic selector (2576GM) disconnect the line at port H and install a plug on the disconnected hydraulic line.
- on the Yellow hydraulic system, pressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
- use the Yellow electric pump to pressurize the Yellow brake
accumulator (2582GM) to 206 bars (2988 PSI) and stop the pump. - on the automatic selector (2576GM) do a check for leakage at port
H.
(a) If leakage is more than 60 drops/min:
- replace the AUTOMATIC SEL-BRK (2576GM) (Ref. AMM TASK 32-42-13-000-001) (Ref. AMM TASK 32-42-13-400-001).
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(b) If leakage is in the permitted tolerances: - operate the manual depressurisation pushbutton of the relief valve (3067GM) to release the accumulator pressure.
- on the Yellow hydraulic system, depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
- connect the line at port H.
(5) Do a check of the Yellow brake accumulator (2582GM) - on the brake accumulator (2582GM) release the nitrogen pressure.
- remove the ACCU-BRK YELLOW PRESS (2582GM) (Ref. AMM TASK 32-44-11-000-001).
- in the accumulator, on the nitrogen side, do a check for hydraulic fluid (Ref. CMM 324411).
(a) If there is hydraulic fluid:
- replace the Yellow brake accumulator (2582GM) (Ref. AMM TASK 32-44-11-400-001). 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 起落架 LANDING GEAR 2(55)
