(2)
 Clean the fixed windows (Ref. TASK 56-10-00-110-002).

 Subtask 56-11-12-865-063
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU COM NAV/RADAR/1 5SQ1 K13 122VU ANTI ICE/WINDOWS/R 4DG2 W14 122VU ANTI ICE/WHC/2 5DG2 W13 122VU ANTI ICE/WINDOWS/L 4DG1 X14 122VU ANTI ICE/WHC/1 5DG1 X13 123VU ANTI ICE/L/WHSLD 1DG1 AF10 123VU ANTI ICE/R/WHSLD 1DG2 AF03
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 4. Procedure
_________ Subtask 56-11-12-220-055
 A. Inspection of the Fixed Windows
 (1) Inspection of the acrylic fixed windows (LUCAS/ACT supplier, P/N NH...)
 NOTE : "Impaired": in inspection tables the word "impaired" refers to
____ visibility. Visibility is "impaired" when defects have an effect on visibility. If visibility is "impaired", you must replace the window panel.
 (a) Make an inspection of the acrylic fixed window for :
 1_ Cracks
 (Ref. Fig. 609/TASK 56-11-12-991-036)
 2_ Scratches
 (Ref. Fig. 610/TASK 56-11-12-991-037)
 3_ Chips
 (Ref. Fig. 611/TASK 56-11-12-991-038)
 4_ Delamination
 (Ref. Fig. 612/TASK 56-11-12-991-039)
 5_ Bubbles
 (Ref. Fig. 613/TASK 56-11-12-991-040)
 6_ Discoloration or burning
 (Ref. Fig. 613/TASK 56-11-12-991-040)
 7_ Transparency
 (Ref. Fig. 613/TASK 56-11-12-991-040)
 8_ Crazing
 (Ref. Fig. 614/TASK 56-11-12-991-041)
 9_ Burn spots
 (Ref. Fig. 615/TASK 56-11-12-991-042) 

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 Acrylic Fixed Window - Permitted Damage
 Figure 609/TASK 56-11-12-991-036

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 Acrylic Fixed Window - Permitted Damage
 Figure 610/TASK 56-11-12-991-037

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 Acrylic Fixed Window - Permitted Damage
 Figure 611/TASK 56-11-12-991-038

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 Acrylic Fixed Window - Permited Damage
 Figure 612/TASK 56-11-12-991-039

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 Acrylic Fixed Window - Permitted Damage
 Figure 613/TASK 56-11-12-991-040

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 Acrylic Fixed Window - Permitted Damage
 Figure 614/TASK 56-11-12-991-041

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 Acrylic Fixed Window - Permitted Damage
 Figure 615/TASK 56-11-12-991-042

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 (b)
 Do a check for burn spots. (Ref. Fig. 616/TASK 56-11-12-991-043)

 (c)
 Do a check for crazing (Ref. Fig. 617/TASK 56-11-12-991-044)

 1_ Put a light source at 45 deg. to the outer surface of the
 window panel.
 2_ Do a check of the bus bar for burn spots.

 1 Get a metal scale 150 mm (5.9 in.) long.
_
 2 Put the metal scale perpendicular to the surface of the
_ sliding window panel where the crazing is the deepest.
 3 Look at the scale reflection with an angle of vision of 45
_ deg. to find the apparent depth of the crazing damage.
 4 The correct depth is approximately two times the apparent
_ depth.
 5 Where crazing is relatively shallow, a hand-held magnifying
_ glass is useful as an optical aid.
 (2) Inspection of the glass fixed windows (PPG supplier, P/N NP... and SPS supplier, P/N SPS...)
 NOTE : "Impaired": in inspection tables the word "impaired" refers to
____ visibility. Visibility is "impaired" when defects have an effect on visibility. If visibility is "impaired", you must replace the window panel.
 (a) Make an inspection of the glass fixed window for:
 1_ Cracks
 (Ref. Fig. 618/TASK 56-11-12-991-045)
　
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