B-52 Windows

How many fuselage windows are there?

13 fuselage windows

Where are the fuselage windows located?

Pilot/copilot compartment

Which window is sliding

Window No.3

Which window is made from a single thickness of formed acrylic plastic

Window No. 6L and No. 6R

Which windows are laminated with outer and inner panes, tempered glass with a vinyl core between the panes

All windows except 6L and 6R

Which pane of laminated glass structure carries the pressurization load

The inner pane

Which panes need to be inspected

The inner and outer panes

If you’re not sure which pane is cracked then consider it to be in…?

Consider the crack to be in the inner pane

in both heated and unheated windows what may appear in the vinyl core

Bubbles

What are the bubbles caused by

Gas build up from the vinyl core

(They don’t effect the strength of the window but the visibility)

Delamination

Seperation of the inner and outer panes from the vinyl core

Delaminating starts where?

Near the edge of the glass and progresses inward (milky cloudy appearance)

Chipping normally occurs where

In unheated areas of the window

Chipping looks like what?

Clam shell shaped and have a rough grained appearance (white powdered glass may be present)

what can be caused by bus bar breakdown (arcing at bus bar)

Darkened, burned and/or discolored areas around the electrical braid or bus bar

Bus bar breakdown can cause what

Interruptions in the window electrically conductive coating

Crazing of acrylic panes causes what

A series of hairline cracks on the outer acrylic layer of a window

The amount of crazing is of what?

A minor structural significance but greatly interfere with visibility

Which windows have anti- icing

Every window but No.6L and 6R

Which windows have 2 heat ranges, Normal and High

Windows 1,2R,2L,3R,3L,4R,4L

Which windows have only one heat range by a thermal snap switch

Windows No. 5L, 5 R and copilots/pilots escape hatch

Where do you not operate anti-icing

The ground

External heat source temperature should not exceed

160 degrees F