The passenger compartment window let persons see out of the passenger compartment. Two of the windows are installed in the emergency exits (Ref. 52-20-00). The two larger windows are observation windows.
Component Description (Ref. Fig. 1 and Fig. 2)
The primary parts of the windows are:
Passenger Compartment Window: It has two transparent acrylic panels (inner and outer) which are installed in the grooves of the seal.
Observation Window: It has two layers of acrylic glazing with a polyurethane layer between the acrylic layers.