(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 38-41-41-010-050-A
 D. 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, 162PW.

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

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

 Subtask 38-41-41-020-050
 A. Removal of the Check Valve 4205MM WARNING : MAKE SURE THAT THE WATER TANK IS DEPRESSURIZED.
_______
 (1)
 Release the unions (4).

 (2)
 Remove the tube assembly (5).

 (3)
 Put blanking plugs on the disconnected line ends.

 (4)
 Remove the check valve (3) from the air filter assembly (1).

 (5)
 Remove and discard the O-ring (2).

 Check Valve 4205MM
 Figure 401/TASK 38-41-41-991-001

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

 Check Valve 4205MM. Figure 401A/TASK 38-41-41-991-001-A
R 1EFF : 151-199, 301-399, 401-499, 1 38-41-41Page 405 1 1 Aug 01/05 1 1 1CES 1

 TASK 38-41-41-400-001

 Installation of the Valve 4205MM
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Expendable Parts
 -------------------------------------------------------------------------------
FIG.ITEM |DESIGNATION |IPC-CSN
 -------------------------------------------------------------------------------
2 O-ring 38-41-03 09 -170 2 O-ring 38-41-04 12 -080
 B. 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 38-41-00-790-001 Leak Check of the Components in the Air Supply System 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,
 38-41-41-991-001 Fig. 401
R **ON A/C 151-199, 301-399, 401-499,
 38-41-41-991-001-A Fig. 401A

 **ON A/C ALL

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

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

 (Ref. Fig. 401/TASK 38-41-41-991-001) R **ON A/C 151-199, 301-399, 401-499,
 (Ref. Fig. 401A/TASK 38-41-41-991-001-A)
 **ON A/C 001-049, 051-099, 101-149, 201-299,

 Subtask 38-41-41-420-051
 A. Installation of the Check Valve 4205MM
 (1)
 Remove the blanking plugs from the line ends.

 (2)
 Install a new O-ring (2) on the valve (3).

 (3)
 Install the valve (3) in the air filter assembly (1).

 (4)
 Install the tube assembly (5).

 (5)
 Tighten the unions (4).

R **ON A/C 151-199, 301-399, 401-499,
 Subtask 38-41-41-420-051-A
 A. Installation of the Check Valve 4205MM
 (1)
 Remove the blanking plugs from the line ends.

 (2)
 Install a new O-ring (2) on the valve (3).

 (3)
 Install the valve (3) in the air filter assembly (1).

 (4)
 Install the tube assembly (5).

 (5) Tighten the unions (4).
 **ON A/C ALL

 Subtask 38-41-41-613-050
 B. Service the potable water system (Ref. TASK 12-15-38-613-001).
　
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