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 (4)  S 424-026Put the window assembly in the frame.
 NOTE:____ If you use the same seal you removed, make sure it has not slipped in along the edge of the window frame cutout during the installation.
 (5)  S 434-020Install the window retaining spring clips.
 (6)  S 864-028Turn down the fasteners until the clip face adjacent to the fastener is 0 to 6 degrees in relation to the window pane (Fig. 402).
 NOTE:____ The 0 to 6 degrees is the angle between the window pane (the vertical) and the face of the clip common to screw head.
 NOTE:____ The seal that interfaces with the middle pane will change from a frosted to a solid color indicating full contact.

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747-400 MAINTENANCE MANUAL
 S 434-021
 (7)  On the first four windows of the left or the right side, install the window retainer fittings (Fig. 401).
 (a)  
Use hand pressure only to hold the retainer tightly against the pane with the serrations disengaged.

 (b)  
Tighten the bolts in the range of 50 to 70 pound-inches while you hold the fitting with hand pressure (spring clips should be installed).

 S 224-022
 (8)  Make sure that the outer surface of the window pane or the plug aligns with the outer skin contour (Fig. 402).
 F. Put the Airplane to Its Usual Condition (Fig. 402)
 S 414-023
 (1)  
Install the non-structural inner pane of the sidewall panel and the shade (AMM 25-21-05/201).

 S 114-024

 (2)  
Clean the outer pane.

 CAUTION:_______DO NOT RUB THE SURFACE WITH A DRY CLOTH. IT CAN CAUSE SCRATCHES AND AN ELECTROSTATIC CHARGE WHICH CAN ALSO CAUSE DUST PARTICLES TO ATTACH TO THE WINDOW SURFACE.
 (a)  
Clean the outer pane surface with warm water and castile soap.

 (b)  
Apply soap solution with a clean, cotton, flannel cloth to the pane surface.

 (c)  
Dry the window with a clean, moist chamois.

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747-400 MAINTENANCE MANUAL
 PASSENGER WINDOWS - INSPECTION/CHECK
____________________________________
 TASK 56-21-01-206-001
 1.  Examine the Passenger Windows_____________________________
 A.  General
 (1)  
This procedure contains one task. The task is to examine the passenger windows for damage.

 (2)  
This section applies to all the fuselage passenger windows, the fuselage plugs, and all the entry door windows.

 (3)  
The check is for the window crazing, cracking, chipping, scratches and in-plane cracking.

 CAUTION: APPLICATION OF PAINT OR OTHER UNAPPROVED OR NON-TRANSPARENT
_______ MATERIAL TO THE ACRYLIC PASSENGER WINDOW PANES IS PROHIBITED. SOLVENT IN PAINT WILL CAUSE STRUCTURAL DAMAGE TO THE ACRYLIC AND THE PAINT WILL PREVENT DAMAGE DETECTION.
 (4)  
Remove the window and replace the component if the damage is more than the approved limits (AMM 56-21-01/401).

 (5)  
The definitions of the types of damage are as follows:

 (a)  
Crazing: Small fissures which frequently start from small scratches in the face of the window. The small cracks are not easy to find on a wet window or a window with wax on it. The small cracks look like white or cloudy scratches. You can see the small cracks in good light or when the sun is in the back of the window.

 (b)  
Crack: A fissure you can see the width when you look along the faces of the fissure. A crack can extend at all angles to the surface of a plastic pane. The angle is set by the direction of the driving force. Cracks in stretched acrylic can have chevron or clamshell growth lines (Fig. 601).

 (c)  
Scratch: The removal or displacement of material from the surface of a pane along a line. The ratio of the depth to the width is usually small.
　
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