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

 Subtask 38-31-71-680-050
 B. Drain the waste holding tank 3300MM (Ref. TASK 38-31-00-680-001).
 Subtask 38-31-71-790-050

 C. Do the leak test of the vacuum toilet system and record the result of the test (Ref. TASK 38-31-00-790-002).

 **ON A/C 001-049, 051-099, 101-105,

 Subtask 38-31-71-865-059
 D. Open, safety and tag this(these) circuit breaker(s): -------------------------------------------------------------------------------
PANEL ------ SERVICE ------------------------------------------------------- IDENT. LOCATION------------------
2001VU VACUUM TOILET SYSTEM/LAVATORY POWER  32MG  A01
 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER  45MG  A02
 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER  39MG  A03
 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER  34MG  A04
 2001VU VACUUM TOILET SYSTEM/VACUUM SYS  35MG  A06
 2001VU VACUUM TOILET SYSTEM/VACUUM GEN  33MG  A08
 **ON A/C 106-149, 151-199, 201-299,
 Subtask 38-31-71-865-059-A
 D. Open, safety and tag this(these) circuit breaker(s): ------------------------------------------------------------- ------------------
PANEL ------ SERVICE ------------------------------------------------------- IDENT. LOCATION------------------
2001VU VACUUM TOILET SYSTEM/LAVATORY POWER  A  32MG  A01
 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER  45MG  A02
 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER  D  39MG  A03
 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER  E  34MG  A04
 2001VU VACUUM TOILET SYSTEM/VACUUM SYS  35MG  A06
 2001VU VACUUM TOILET SYSTEM/VACUUM GEN  33MG  A08
 **ON A/C 301-399,
 Subtask 38-31-71-865-059-B
 D. Open, safety and tag this(these) circuit breaker(s): ------------------------------------------------------------- ------------------
PANEL  SERVICE  IDENT. LOCATION

 -------------------------------------------------------------------------------2001VU VACUUM TOILET SYSTEM/LAVATORY POWER A 32MG A01 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER L 45MG A02 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER D 39MG A03 2001VU VACUUM TOILET SYSTEM/LAVATORY POWER E 34MG A04 2001VU VACUUM TOILET SYSTEM/VACUUM SYS 35MG A06 2001VU VACUUM TOILET SYSTEM/VACUUM GEN 33MG A08
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 38-31-71Page 403 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1

 **ON A/C ALL

 Subtask 38-31-71-010-050
 E. Get Access
 (1)
 Open the AFT cargo compartment door (Ref. TASK 52-30-00-860-001).

 (2)
 Put the ACCESS PLATFORM 2M (6 FT) in position.

 (3)
 Open the access panel 162DW.

 4. Procedure
_________ R **ON A/C 001-049, 052-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 (Ref. Fig. 401/TASK 38-31-71-991-001)
 **ON A/C 051-051,

 (Ref. Fig. 401A/TASK 38-31-71-991-001-A)
 **ON A/C ALL

 Subtask 38-31-71-020-050
 A. Removal of the Waste Drain Valve 3340MM WARNING : ALWAYS WEAR RUBBER GLOVES, GOGGLES AND PROTECTIVE CLOTHES WHEN
_______ YOU DO THIS TASK.
 (1)
 Remove the tank drain line (10) (Ref. TASK 38-31-74-000-001).

 (2)
 Remove the nut (3) and the washer (2).

 (3)
 Remove the bolt (1) .

 (4)
 Remove the control lever (5).

 (5)
 Remove the nuts (8) and washers (7) and bolts (6).

 (6)
 Remove the waste drain valve 3340MM (9) and discard the o ring (4).

 Waste Drain Valve
 Figure 401/TASK 38-31-71-991-001

R 1EFF : 001-049, 052-099, 101-149, 151-199, 1 38-31-71Page 405 1201-299, 301-399, 401-499, 1Aug 01/05 1 1 1CES 1

R  Waste Drain Valve 
R  Figure 401A/TASK 38-31-71-991-001-A 
R 1EFF :  051-051,  1  38-31-71 Page 406 
1  1  May 01/05
 1  1
 1CES  1

 (7)
 Put blanking plugs on the disconnected line ends.

 (8)
 Clean the component interface and/or the adjacent area.

 1EFF : ALL 1 38-31-71Page 407 1 1 May 01/05R 1 1 1CES 1

 TASK 38-31-71-400-001
 Installation of the Waste Drain Valve 3340MM
 WARNING : DO NOT DO WORK ON THE TOILET WASTE SYSTEM AND THE POTABLE WATER
_______ SYSTEM AT THE SAME TIME. THIS WILL PREVENT CONTAMINATION OF THE POTABLE WATER SYSTEM. SUCH CONTAMINATION CAN BE DANGEROUS TO HEALTH.
　
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