B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from
 the External Power
 29-10-00-864-002 Depressurize the Yellow Hydraulic System
 32-12-00-010-001 Open the Main Gear Doors for Access
 32-12-00-410-001 Close the Main Gear Doors after Access
 32-43-00-710-001 Operational Check of Alternate Braking System
 32-43-14-000-001 Removal of the Dual-Valve 2577GM Alternate

 Brake-Distribution 32-43-14-200-003 Detailed Visual inspection of the Alternate Brake Dual Distribution Valve (BDDV) 2577GM, for Corrosion 32-43-14-400-001 Installation of the Dual-Valve 2577GM Alternate
 Brake-Distribution
 53-35-13-000-001 Removal of the Belly Fairing Access Panels
 53-35-13-400-001 Installation of the Belly Fairing Access Panels

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32-43-14-991-003 Fig. 601
 3. Job Set-up
__________ Subtask 32-43-14-861-051
 A. Energize the ground service network
 (Ref. TASK 24-42-00-861-001).

 Subtask 32-43-14-860-054
 B. Aircraft Maintenance Configuration
 (1)
 Open the Main Landing Gear (MLG) doors (Ref. TASK 32-12-00-010-001)

 (2)
 Put the access platform in position.

 (3)
 Depressurize the Yellow Hydraulic System (Ref. TASK 29-10-00-864-002)

 (4)
 Put a container 5l under the drain hose to collect water
 accumulation.

 Subtask 32-43-14-010-052
 C. If necessary remove the belly fairing panel 148FB, (Ref. TASK 53-35-13-000-001).
 Subtask 32-43-14-941-053
 D. Safety Precautions
 (1)
 Put the warning notices in position to tell persons not to pressurize the yellow hydraulic system: - on the panel 40VU in the cockpit, - on the ground service panel of the yellow hydraulic system.

 (2)
 Put the safety barriers in position.

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 E. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY 4GG M36 121VU HYDRAULIC/BRAKING AND STEERING/SYS2/CTL 3GG M35 121VU HYDRAULIC/BRAKING AND STEERING/SYS1/CTL 1GG M34 121VU HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY 2GG M33 121VU HYDRAULIC/HYD POWER/Y 3803GX N30 121VU HYDRAULIC/Y HYD/PUMP ENG2/MONG 3700GD Q37 121VU HYDRAULIC/Y HYD/PUMP ENG2/CTL 3701GD Q36 123VU Y HYD/ELEC/PUMP 3802GX AB06 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
 4. Procedure
_________
 (Ref. Fig. 601/TASK 32-43-14-991-003) Subtask 32-43-14-010-055
 A. Preparation for Draining
 (1) Disconnect the drain hose (3):
 (a)
 Make match marks on the clamps and hydraulic lines for the correct position for installation.

 (b)
 Remove the nut (9) and the washer (10).

 (c)
 Pull the drain hose (3) away from the screw (13), make sure that you collect the spacer (12).

 (d)
 Remove the nut (8), the washer (7) and the screw (5).

 (e) Remove the clamp (2) and the plug (1). Subtask 32-43-14-210-053
 B. Draining of the Brake Dual Distribution Valve
 (1)
 Drain the contents of the drain hose (3) into the container.

 (2)
 If you find water in the drain hose, do the procedure for corrosion inspection (Ref. TASK 32-43-14-200-003)

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 Drainage of the Brake Dual-Distribution Valve
 Figure 601/TASK 32-43-14-991-003

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 (3)
 If you find hydraulic fluid in the drain hose, replace the Brake Dual Distribution Valve (BDDV) 2577GM (Ref. TASK 32-43-14-000-001) and (Ref. TASK 32-43-14-400-001).

 (4)
　
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