7. Restore Airplane to Normal Configuration
A. Install map light lamp and housing on No. 4 window frame, if it was removed; on No. 5 window frame, install thermal switch and bracket (11, Fig. 403B).
B. Connect power leads to window bus bar terminals.
C. Install trim panels and crash padding where necessary (Ref Chapter 25, Control Cabin Equipment)
D. Remove protective cover from inside surface of window.
E. Test window heating system (Ref Chapter 30, Control Cabin Window Anti-Icing System).
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Application of Gap Filler 500
56-11-31 Figure 405 Aug 01/94
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WINDOW NO. 4 AND NO. 5 - INSPECTION/CHECK
1. General
A. Inspection/check should be in accordance with established window damage criteria in addition to the following (Ref 56-11-0, Control Cabin Windows - Damage Criteria).
2. Window Inspection – Window No. 4
A. Examine and replace window if center glass pane has any of the following defects:
NOTE: When examining center glass pane, care should be taken to avoid confusion with adjacent inner vinyl layers and inner cast acrylic pane, the condition of which is not critical.
(1)
Cracks of any kind.
(2)
Conchoidal chips in either surface, deeper than 0.015 inch.
(3)
V-shaped chips of any kind.
(4)
Arcing, chips, delaminations or electrical discontinuity rendering window heating system inoperable or which impair visibility.
B. If condition of outer glass pane impairs visibility, window must be replaced. Delaminations of outer pane extending more than 1 inch from edge toward pane center or any crack or delamination of outer pane that affects crew visibility must be replaced.
NOTE: The outer pane is not a structural member. Number 4 window replacement due to outer pane damage should be based upon window heat and visibility requirements.
(1) The decision to replace the window immediately or at the nearest maintenance interval (defects 2.B.) can only be made by the appropriate airline personnel based on their opinion of the severity of the condition.
C. Examine and replace window if outer vinyl layer has cracks or tears of any kind.
3. Window Inspection – Window No. 5
A. Examine and replace window if inner glass pane has any of the following defects:
NOTE: When examining inner glass pane, care should be taken to avoid confusion with adjacent vinyl layer.
(1)
Cracks of any kind.
(2)
Conchoidal chips in either surface, deeper than 0.015 inch.
(3)
V-shaped chips of any kind.
(4)
Arcing, chips, delaminations or electrical discontinuity rendering window heating system inoperable or which impair visibility.
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B. If condition of outer glass pane impairs visibility, window must be replaced. Delaminations of outer pane extending more than 1 inch from edge toward pane center, or any crack or delamination of outer pane that affects crew visibility must be replaced.
NOTE: The outer pane is not a structural member. Number 5 window replacement due to outer pane damage should be based upon window heat and visibility requirements.
(1) The decision to replace the window immediately or at the nearest maintenance interval (defects 3.B.) can only be made by the appropriate airline personnel based on their opinion of the severity of the condition.
C. Examine and replace window if middle vinyl layer has cracks or tears of any kind.
4. Window check
A. Check for loose or missing fasteners in window frame.
CAUTION: TO REDUCE POSSIBILITY OF WINDOW BREAKING, LOOSE OR REPLACEMENT BOLTS SHOULD NOT BE TORQUED MORE THAN SPECIFIED TORQUE VALUE AND SPACERS SHOULD NOT BE TOO SHORT OR TOO TIGHT IN BOLT HOLES (REF WINDOW NO. 4 AND NO. 5 - R/I).
B. Check window heating system for correct functioning (Ref Control Cabin Window Anti-Icing System, Chapter 30).
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