Subtask 30-42-34-865-051
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
R R -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 2DG1 122VU ANTI ICE/WINDOWS/L 4DG1 X14 122VU ANTI ICE/WHC/1 5DG1 X13 123VU ANTI ICE/L/WHSLD 1DG1 AF10 FOR 2DG2 122VU ANTI ICE/WINDOWS/R 4DG2 W14 122VU ANTI ICE/WHC/2 5DG2 W13 123VU ANTI ICE/R/WHSLD 1DG2 AF03
4. Procedure_________
(Ref. Fig. 401/TASK 30-42-34-991-001)
Subtask 30-42-34-420-050
A. Install the Window Heat Computer.
(1) Install the WHC (3).
(2) Install the screws (2) and the washers (1). Tighten the screws (2).
(3) Remove blanking caps and connect the electrical connectors (4) and (5).
5. Close-up________
Subtask 30-42-34-865-052
R R R A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 2DG1 1DG1, 4DG1 FOR 2DG2 1DG2, 4DG2
R Subtask 30-42-34-865-053
R R R R R R B. After two seconds, remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 2DG1 5DG1 FOR 2DG2 5DG2
Subtask 30-42-34-710-050
R C. Do an operational test of the cockpit windshield anti-icing and defogging system. (Ref. TASK 30-42-00-710-001)
Subtask 30-42-34-410-050
R D. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the access door 811.
(3) Remove the access platform(s).
WINDSHIELD RAIN PROTECTION - DESCRIPTION AND OPERATION
______________________________________________________
1. General
_______
R **ON A/C 001-049, 051-099, 101-149, 152-199, 201-299, 301-399, 401-499,
Rain removal from the right and left windshields is achieved by two systems:
-
a wiper system,
-
a hydrophobic coating.
**ON A/C 151-151,
Rain removal from the right and left windshields is achieved by two systems:
-
a wiper system,
-
a rain repellent fluid system.
**ON A/C ALL
A. Wiper System
(Ref. Fig. 001, 002)
-Two wipers are available, one for the left (Captain) windshield and one for the right (First Officer) windshield.
-
The two wipers are independently actuated through two-speed electric motors controlled by the WIPER control switches.
-
The wipers have a parking position clear of the area of visibility with the wiper blades just lifted from the windshield surface to avoid sand accumulation which could cause scratching of the windshield.
B. Rain Repellent System
(Ref. Fig. 003, 004)
(1)
The system is designed to improve visibility through the windshield in heavy rain particularly when the wipers are not sufficient.
(2)
The system enables a special rain-repellent fluid to be sprayed in one or several applications on the windshield; the fluid is designed to increase the surface tension of water. The increase in surface tension:
-eliminates the film of water on the windshield; the water film is of variable thickness and impairs vision,
-causes water to remain in the form of droplets (similarity with mercury),
Wiper System - Controls Location
Figure 001
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Wiper System - Component
Figure 002
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Rain Repellent System - Control Location
Figure 003
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Rain Repellent System - General View
Figure 004
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-facilitates evacuation of these droplets under dynamic effect of airstream; the droplets do not wet the windshield surface. Purging of the spray nozzles with air serves to prevent clogging. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM ICE AND RAIN PROTECTION 防冰和排雨2(15)
