(3)
 Make sure that the electrical connectors are clean and in the correct condition.

 (4)
 Connect the electrical connector (3) and bring the drain mast connector holder (7) into the fuselage opening.

 NOTE : Be careful not to damage the extensible bellows when you
____ install the drainmast pipe into the fuselage opening.
 (5) Bring the drain mast pipe (6) in line with the extensible bellows (5).
 NOTE : Be careful when you install the extensible bellows.
____
 (6) Install the extensible bellows (5) slowly and carefully to the drain mast pipe (6).
 NOTE : Make sure that the position of the clamp screw is between the
____
 drain mast pipe and the connector holder.

 (7)
 Connect the clamp (4) to the extensible bellows (5).

 (8)
 Let the drain mast (1) hang.

 (9)
 Do a leakage test

 (a)
 Put a ceiling cap over the drain mast outlet.

 (b)
 Use a related washbasin which is installed to the related drain mast and fill it with a half liter of water.

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 (c)
 Do a visual leakage check of the drain mast, extensible bellows and the applicable aircraft tubing.

 (d)
 Remove the ceiling cap from the drain mast outlet.

 (10) Install the drain mast
 (a)
 Install the drain mast (1) carefully to the structure.

 (b)
 Install the screws (2) to the drain mast (1).

 (c)
 Make a sealing bead with SEALANTS (Material No. 09-016) around the drain mast (1) (Ref. TASK 51-76-11-300-001).

 (d)
 Make the contour of the sealant around the drain mast (1) smooth.

 (e)
 Let the sealant cure.

 (f)
 Apply STRUCTURE PAINTS (Material No. 16-003) to the sealant around the drain mast and the screw heads.

R **ON A/C 001-049, 052-099, 101-105, 301-399, 401-499,
 Subtask 30-71-51-865-056
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1DU, 11DU.
 **ON A/C 051-051,
 Subtask 30-71-51-865-056-C
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1DU, 11DU, 21DU.
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 30-71-51Page 425 1204-299, 301-399, 401-499, 1Aug 01/05 1 1 1CES 1 **ON A/C 106-149, 201-299,

 Subtask 30-71-51-865-056-A
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL SERVICE IDENT. LOCATION -------------------------------------------------------------------------------2000VU WASTE WIP - DRAINMAST FWD 1DU B06 2001VU WASTE WIP - DRAINMAST AFT 11DU E01
 **ON A/C 151-199,
 Subtask 30-71-51-865-056-B
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL SERVICE IDENT. LOCATION -------------------------------------------------------------------------------2000VU WASTE WIP - DRAINMAST FWD 1DU D01 2001VU WASTE WIP - DRAINMAST AFT 11DU E01
 **ON A/C ALL
 Subtask 30-71-51-710-051
 C. Do the operational test of the Drainmast Ice Protection (Ref. TASK 30-71-00-710-001).
 1EFF : ALL 1 30-71-51Page 426 1 1 Aug 01/05R 1 1 1CES 1

 5. Close-up
________ **ON A/C 001-049, 052-061, 101-103, 201-210,
 Subtask 30-71-51-410-053
 A. Close Access
 (1)
 FOR 4DU, 14DU

 (2)
 Make sure that the work area is clean and clear of tools and other items.

 (3)
 Pressurize the Potable Water System (Ref. TASK 38-10-00-614-001).

 (a) Remove the wash basin plug from the wash basin drain hole and stow.

 (4)
 FOR 4DU

 (a)
 Install the floor panel 131SF in the FWD cargo compartment (Ref. TASK 53-22-14-400-001).

 (b)
 Set the CARGO COMPT LT switch 6LU to OFF.

 (c)
 Close the FWD cargo-compartment door (Ref. TASK 52-30-00-860-002).

 (5)
 FOR 14DU

 (a)
 Install the partition 162DW in the AFT cargo compartment.

 (b)
 Set the CARGO COMPT LT switch 8LU to OFF.

 (c)
 Close the AFT cargo-compartment door (Ref. TASK 52-30-00-860-002).

 (d)
 Remove the access platform.