______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific blanking plugs
 No specific access platform 2.0 m (6 ft. 7 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
 External Power 38-10-00-614-002 Depressurization of the Potable Water System 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the
 Yellow Electric Pump
 **ON A/C 001-049, 051-099, 101-149, 201-299,
 38-41-43-991-001 Fig. 401 R **ON A/C 151-199, 301-399, 401-499,
 38-41-43-991-001-A Fig. 401A **ON A/C ALL

 3. Job Set-up
__________
 Subtask 38-41-43-861-050

 A. Energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-861-002).

 Subtask 38-41-43-614-050
 B. Depressurize the potable water system. (Ref. TASK 38-10-00-614-002). **ON A/C 001-049, 051-099, 101-149, 201-299,
 Subtask 38-41-43-010-050
 C. Get Access
 (1)
 Put the access platform in position.

 (2)
 Open the FWD cargo-compartment door (Ref. TASK 52-30-00-860-001).

 (3) Remove the access panels 131NW, 132PW. R **ON A/C 151-199, 301-399, 401-499,
 Subtask 38-41-43-010-050-A
 C. Get Access
 (1)
 Put the access platform in position.

 (2)
 Open the AFT cargo-compartment door (Ref. TASK 52-30-00-860-001).

 (3)
 Remove the access panels 161DW.

 **ON A/C ALL
 4. Procedure
_________
 **ON A/C 001-049, 051-099, 101-149, 201-299,

 (Ref. Fig. 401/TASK 38-41-43-991-001) R **ON A/C 151-199, 301-399, 401-499,
 (Ref. Fig. 401A/TASK 38-41-43-991-001-A)
 **ON A/C ALL

 Subtask 38-41-43-020-050
 A. Removal of the Pressure Reducing Valve 4200MM
 (1)
 Disconnect the pipes (1) and (5).

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

 (3)
 Remove the nuts (3) and the washers (2).

 (4)
 Remove the pressure reducing valve 4200MM (4).

 Pressure Reducing Valve 4200MM
 Figure 401/TASK 38-41-43-991-001

R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 38-41-43Page 404 1 1 May 01/05 1 1 1CES 1

 Pressure Reducing Valve 4200MM. Figure 401A/TASK 38-41-43-991-001-A
R 1EFF : 151-199, 301-399, 401-499, 1 38-41-43Page 405 1 1 Aug 01/05 1 1 1CES 1

 TASK 38-41-43-400-001

 Installation of the Pressure Reducing Valve 4200MM
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
12-15-38-613-001 Fill the Potable Water Tank System (Aircraft Electrical Power Available) 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
 from the External Power
 38-10-00-614-002 Depressurization of the Potable Water System
 38-41-00-710-001 Operational Test of the Air Supply System (with

 ground air supply) 38-41-00-790-001 Leak Check of the Components in the Air Supply System 38-41-00-820-001 Adjustment of the Pressure Reducing and Relief Valve
 4200MM 52-30-00-860-002 Close the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump
 **ON A/C 001-049, 051-099, 101-149, 201-299,
 38-41-43-991-001 Fig. 401
R **ON A/C 151-199, 301-399, 401-499,
 38-41-43-991-001-A Fig. 401A

 **ON A/C ALL

 3. Job Set-up
__________
 Subtask 38-41-43-860-050

 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).

 (2)
 Make sure that the potable water system is depressurized (Ref. TASK 38-10-00-614-002).

 4. Procedure
　
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