Description (AMM 30-41-00)

 

A- The construction of window No. 4 consists of a glass pane laminated to each side of a polyvinyl butyral (vinyl) interlayer, or core, with an additional vinyl layer laminated to the inboard surface of the inner pane. A cast acrylic sheet is laminated to the additional vinyl layer (Fig. 1). These additional layers prevent glass from scattering throughout the cabin in the event of bird impact.

 

The additional layers are of no structural importance. A thin parting medium is laminated around the window edges between the vinyl interlayers and each glass pane to prevent edge chipping of the glass under conditions of differential expansion and contraction. Triplex windows have a soft vinyl layer around the edge of the window between the outer glass pane and the outer vinyl layer and between the inner glass pane and the outer vinyl pane, instead of the parting medium.

 

B- A conductive film, applied on the outer face of the inner glass pane permits electrical heating for anti-icing and defogging. Bus bars molded into the upper and lower edges of the windows in contact with the conductive film are connected to electrical terminals. For further information concerning window anti-icing and defogging refer to Chapter 30, Control Cabin Window Anti-Icing System.