(5) Remove the ground support and maintenance equipment, the special and

 standard tools and all other items.

 1EFF : ALL 1 28-25-00Page 410 1 1 May 01/05R 1 1 1CES 1

 TASK 28-25-00-040-004
 Deactivation of the Transfer Defuel Valve
 WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______ START A TASK ON OR NEAR:
 -
THE FLIGHT CONTROLS

 -
THE FLIGHT CONTROL SURFACES

 -
THE LANDING GEAR AND THE RELATED DOORS

 -COMPONENTS THAT MOVE.
 WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
 1. Reason for the Job
__________________
 Refer to the MMEL TASK: 28-25-05
 Refuel/Defuel System
 Transfer Defuel Valve

 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps No specific circuit breaker(s) safety clip(s) No specific polythene bag No specific safety barriers No specific warning notice No specific access platform 3.0 m (9 ft. 10 in.) T720456 1 VALVE LOCKING TOOL
 1EFF : ALL 1 28-25-00Page 411 1 1 May 01/05R 1 1 1CES 1

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-00-00-910-001 Fuel Safety Procedures 28-25-53-000-001 Removal of the Center-Tank Defuel/Transfer Valve-Actuator (11QU) 28-25-53-400-001 Installation of the Center-Tank Defuel/Transfer
 Valve-Actuator (11QU) 32-12-00-010-001 Open the Main Gear Doors for Access 32-12-00-410-001 Close the Main Gear Doors after Access 28-25-00-991-016 Fig. 402 28-25-00-991-024 Fig. 403
 3. Job Set-up
__________ (Ref. Fig. 402/TASK 28-25-00-991-016, 403/TASK 28-25-00-991-024) Subtask 28-25-00-941-072
 A. Safety Precautions
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.

_______
 (1)
 You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.

 (2)
 Put the safety barriers in position.

 (3)
 Put a warning notice in position to tell persons not to operate the MLG doors.

 Subtask 28-25-00-010-072
 B. Get Access
 (1)
 Open the MLG doors (Ref. TASK 32-12-00-010-001).

 (2)
 Make sure that the GROUND LOCK SLEEVE is on the applicable MLG door actuator.

 (3)
 Put an access platform below the transfer defuel valve (11QM).

 1EFF : ALL 1 28-25-00Page 412 1 1 May 01/05R 1 1 1CES 1

 Transfer Defuel Valve (11QM) - Location and Detail Figure 402/TASK 28-25-00-991-016
 1EFF : 1 1R 1CES  ALL  1 11 1 28-25-00 Page 413 May 01/05

 Refuel/Defuel Control Panel Figure 403/TASK 28-25-00-991-024
 1EFF : 1 1R 1CES  ALL  1 11 1 28-25-00 Page 414 May 01/05

 (4) Open the access panel 192MB. NOTE : Do not keep the door open longer than necessary because the
____
 battery can discharge.

 Subtask 28-25-00-860-054
 C. Aircraft Maintenance Configuration
 (1) On the panel 800VU, make sure that the MODE SELECT switch is in the OFF and guarded position.
 Subtask 28-25-00-865-057
 D. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU FUEL/RFL/DFL/XFR/DEFUEL/VALVE 1QU L23
 4. Procedure
_________
 (Ref. Fig. 402/TASK 28-25-00-991-016, 403/TASK 28-25-00-991-024) Subtask 28-25-00-040-050
 A. Transfer Defuel Valve - Closure Procedure
 (1) If the actuator (11QU) shows the transfer defuel valve (11QM) in the open position (see/feel indicator in-line):
 (a)
 Remove the actuator (11QU) from the drive shaft of the transfer defuel valve (11QM) (Ref. TASK 28-25-53-000-001).

 (b)
 Manually turn the drive shaft to the valve-closed position (indicator groove vertical).

 (c)
 Make sure that the actuator (11QU) shaft is in the correct position (see/feel indicator cross-line) to align with the valve drive shaft.

 (d)
 If necessary, close the circuit breaker 1QU on the panel 121VU, and operate the actuator (11QU) to get the correct position. Open the circuit breaker 1QU.
　
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