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REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-00-00-864-001 29-14-00-614-001 29-23-00-860-001 32-00-00-481-001 32-00-00-481-002 32-12-00-010-001 32-31-13-991-001  Put the Related Hydraulic System in the Depressurized Configuration before Maintenance ActionDepressurization of the Hydraulic ReservoirsDisconnection of the Isolation Coupling of the Power Transfer Unit (PTU)Installation of the Safety Devices on the Landing GearsInstallation of the Safety Devices on the Landing Gear DoorsOpen the Main Gear Doors for AccessFig. 401
 3. Job Set-up__________
 Subtask 32-31-13-941-050
 A. Safety Precautions 
R R  (1) Put the safety barriers in position. 
R R  (2) Make sure that the ground safety locks are installed on the landing gear (Ref. TASK 32-00-00-481-001).
R R R R  (3) On the panel 400VU: - make sure that the landing-gear control-lever 6GA is in the DOWN position - put a warning notice in position to tell persons not to operate the landing gear.
R  (4) Put a warning notice on the ground connection to tell persons not to pressurize the Yellow and Green Hydraulic systems.

 

 B. Get Access
 (1)
 Put the access platform in position below the applicable bypass-valve: FOR 2517GM below zone 731 FOR 2518GM below zone 741.

 (2)
 Put a container below the applicable bypass-valve.

 (3) Open the applicable MLG door (Ref. TASK 32-12-00-010-001). R (4) Make sure that a GROUND LOCK SLEEVE is installed on the applicable
R  MLG door actuating cylinder (Ref. TASK 32-00-00-481-002). Subtask 32-31-13-860-052
 C. Aircraft Maintenance Configuration
 (1)
 Make sure that the Yellow and Green hydraulic systems are depressurized (Ref. TASK 29-00-00-864-001).

 (2)
 Make sure that the applicable hydraulic reservoirs are depressurized (Ref. TASK 29-14-00-614-001).

 (3)
 Disconnect the isolation coupling of the PTU (Ref. TASK 29-23-00-860-001).

 4. Procedure
_________
 (Ref. Fig. 401/TASK 32-31-13-991-001)
 Subtask 32-31-13-020-050
 A. Removal of the MLG Door Ground-Opening Bypass-Valve WARNING : DO NOT LET OIL STAY ON YOUR SKIN FOR A LONG TIME AS IT CAN
_______
 CAUSE INJURY.

 CAUTION : MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT
_______ STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.
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 MLG Door Ground-Opening Bypass-Valve - Location and Detail
 Figure 401/TASK 32-31-13-991-001

 1EFF : ALL 1 32-31-13Page 404 1 1 Feb 01/98 1 1 1CES 1

 (1)
 Disconnect the end-fittings (1) of the hydraulic pipe-lines from the unions (2).

 (2)
 Put blanking plugs on the disconnected line ends.

 (3)
 Disconnect the control-rod (11) of the door-uplock from the bypass-lever (7).

 (a)
 Remove and discard the cotter pin (9).

 (b)
 Remove the nut (10), the washer (8), the bolt (13) and the bush (12).

 (c)
 Disconnect the flexible control assembly (29) from the bypass-lever (26) as follows:

 

 (4)
 Hold the bypass-valve (4) and remove the nuts (18) and the bolts (5). Remove the bypass-valve (4).

 (5)
 If you are to replace the bypass-valve (4), do these steps:

 (a)
 Remove and discard the cotter pin (15).

 (b)
 Remove the nut (14), the washer (16) and the bolt (6).

 (c)
 Remove the bypass-lever (7).

 (d)
 Remove and discard the cotter pin (22).

 (e)
 Remove the nut (19), the washer (20) and the bolt (21).

 (f)
 Remove the bypass-lever (26).

 (g)
 Put tape, protective on the splines at each end of the shaft (17).

 (h)
 Remove the unions (2) from the bypass-valve (4) and put the blanking plugs in the hydraulic openings.

 (i)
 Remove and discard the packings (3).

 

 1_ Remove and discard the cotter pin (24).
 2_ Remove the nut (23), the washer (25), the bolt (28) and the
 bush (27).

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 TASK 32-31-13-400-001
 Installation of the MLG Door Ground-Opening Bypass-Valve 2517GM (2518GM)
 WARNING : MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING
　
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