(2)
 Remove the wiper blade (2) from the wiper arm (3).

 1EFF : ALL 1 30-45-53Page 403 1 1 May 01/05R 1 1 1CES 1

 Wiper Blade Figure 401/TASK 30-45-53-991-001-A
 1EFF : 1 1R 1CES  ALL  1 11 1 30-45-53 Page 404 May 01/05

 TASK 30-45-53-400-001 Installation of the Wiper Blade WARNING : MAKE SURE THAT THE CIRCUIT BREAKERS RELATED TO THE WEATHER RADAR ARE
_______
 OPENED, SAFETIED AND TAGGED.

 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 3.5 m (11 ft. 6 in.) R No specific Torque Wrench : range 0.00 to 1.20 m.daN R (0.00 to 9.00 lbf.ft)
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 05-002  USA MIL-P-8116 PUTTY, ZINC CHROMATE GENERAL PURPOSE (Ref. 20-31-00)
 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
30-45-53-991-001-A  Fig. 401

 3. Job Set-up__________
 Subtask 30-45-53-865-051
 A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
R  -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 304DM 121VU COM NAV/RADAR/1 5SQ1 K13 
R  **ON A/C 051-099, 
R  121VU COM NAV/RADAR/2  5SQ2  K14 
R  **ON A/C ALL 
R R  122VU ANTI ICE/F/O/WIPER FOR 305DM 121VU COM NAV/RADAR/1  4DB2 5SQ1  W12K13 
R  **ON A/C 051-099, 
R  121VU COM NAV/RADAR/2  5SQ2  K14 
R  **ON A/C ALL 
R  122VU ANTI ICE/WIPER/CAPT  4DB1  X12
 Subtask 30-45-53-860-050
 B. Make sure that the access platform is in position.

 4. Procedure
_________

 (Ref. Fig. 401/TASK 30-45-53-991-001-A)
 Subtask 30-45-53-420-050-A

 A. Installation of the Wiper Blade
 (1)
 Install the wiper blade (2) on the wiper arm (3).

 (2)
 Install the bolt (1) with SPECIAL MATERIALS (Material No. 05-002). TORQUE the bolt (1) to 0.22 m.daN (19.46 lbf.in).

 5. Close-up
________
 Subtask 30-45-53-942-050

 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.
 (2) Remove the access platform(s).
 Subtask 30-45-53-865-052

 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 304DM
R  4DB2, 5SQ1, 5SQ2 FOR 305DM R 4DB1, 5SQ1, 5SQ2

 DRAIN MAST ICE PROTECTION - DESCRIPTION AND OPERATION
_____________________________________________________
 1. General
_______

R **ON A/C 001-049, 052-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 (Ref. Fig. 001) The waste water ice protection is installed to prevent ice formation in the drain lines and fwd and aft drain masts. The waste water which comes from the galley and lavatory washbasins is discarded through the drain lines and drain masts to atmosphere. Waste water lines installed in areas of posssible icing conditions, are heated by electrical tape heating elements and insulated. Heaters are installed in the fwd and aft drain masts to prevent ice formation. Ice-Protection control units are installed in the fwd and aft cargo compartments regulate through the sensors the heating elements of the drain lines and drain masts.
 **ON A/C 051-051,
 (Ref. Fig. 001) The waste water ice protection is installed to prevent ice formation in the fwd and aft drain masts. The waste water which comes from the galley and lavatory washbasins is discarded through the drain lines and the drain masts to atmosphere. Waste water lines installed in areas of posssible icing conditions, are heated by electrical tape heating elements and insulated. Heaters are installed in the fwd and aft drain masts to prevent ice formation. A heated and insulated drainage system is installed in the fwd and aft cargo compartments to drain condensation which can cause corrosion and formation of ice. Ice Protection control units are installed in the fwd and aft cargo compartments of the aircraft to regulate through the sensors the heating elements of the drain mast, waste water lines and the fwd and aft cargo compartment drainage system.
　
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