- on the dual shuttle-valve (2578GM) do a check for leaks at ports D and E.
 (a) If leakage at port D or port E is more than 2 drops/min:

 - replace the DUAL SHUTTLE VALVE-BRK YELLOW PRESS (2578GM) (Ref. AMM TASK 32-45-16-000-001) (Ref. AMM TASK 32-45-16-400-001).

 (b) If leakage at ports D and E 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 hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
 - connect the lines at ports D and E.
 (4) Do a check for leakage of the brake automatic selector (2576GM)
 - on the automatic selector (2576GM) disconnect the line at port H and install a plug on the disconnected hydraulic line.
 - in the cockpit, set the PARKING BRK control switch to OFF.

 - on the Yellow hydraulic system, pressurize the 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.

 - set the PARKING BRK control switch to ON.
 - on the automatic selector (2576GM) do a check for leaks at port H.

 (a) If leakage at port H 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).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞32-45-00∞∞∞∞∞∞∞∞∞∞Page 205
 201-299, 301-399, Aug 01/05 CES

 (b) If leakage at port H 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 hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
 - connect the line at port H.
 (5) Do a check of the parking brake operated valve (2579GM)
 - on the parking brake operated valve (2579GM) disconnect the line at port B and install a plug on the disconnected hydraulic line.
 - in the cockpit, set the PARKING BRK control switch to ON.

 - on the Yellow hydraulic system, pressurize the 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 parking brake operated valve (2579GM) do a check for leaks at port B.
 (a) If leakage at port B is more than 2 drops/min:

 - replace the VALVE-PARK BRK OPERATED (2579GM) VALVE-PARK BRK OPERATED (2579GM) (Ref. AMM TASK 32-45-14-000-001) (Ref. AMM TASK 32-45-14-400-001).

 (b) If leakage at port B 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 hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
 - connect the line at port B.
 (6) 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).

 (b) If there is no hydraulic fluid:

 - replace the CHECK VALVE-BRK SYS, Y (3058GM) CHECK VALVE-BRK SYS, Y (3058GM).

 - install the Yellow brake accumulator (2582GM) (Ref. AMM TASK 32-44-11-400-001).

 (7) Do a check of the parking brake manifold (3016GM):

 - inflate the accumulator with nitrogen (Ref. AMM TASK 12-14-32-614-002).
 - on the Yellow hydraulic system, pressurize the hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞32-45-00∞∞∞∞∞∞∞∞∞∞Page 206
 201-299, 301-399, Aug 01/05 CES

 - use the Yellow electric pump to pressurize the Yellow brake accumulator (2582GM) to 206 bars (2988 psi) and stop the pump.
 (a) If the fault continues:
 - replace the MANIFOLD (3016GM) (Ref. AMM TASK 32-44-17-000-001) (Ref. AMM TASK 32-44-17-400-001).
R **ON A/C 401-499,
　
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