B737
Effectivity
LiteAir has a window plug for every window position on the following Boeing 737 airplanes: 737-100, 737-200, 737-200C, 737-300, 737-400, 737-500, 737-600, 737-700, 737-700C, 737-800, 737-900
The window plugs are CNC machined from aluminum.
Parts – 737
The part numbers used at each window location are shown below.
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| Machined Lightweight Window Plugs |
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| Part Number |
Location |
LAP 4007-3
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All window locations, except Emergency Exit window.
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| LAP 4009-1 |
Emergency Exit window |
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Weight: The LiteAir Window Plug weighs 1.7 lb.
Installation: The LiteAir Window Plug is installed per LiteAir’s STC. The STC installs the components per the OEM Maintenance Manual using the Window Plug OEM seal and the existing retaining clips. The Window Plug is a ‘one-piece’ installation which eliminates the need for the installation of the acrylic Middle Pane.
Maintenance: Visual inspection at each ‘D’ check or 24,000 flight hours. The STC allows for component repair.
Advantages – 737
Weight: The weight of the LiteAir Window Plug installation is 2.4 pounds less (per window) than the OEM acrylic window installation. This can produce more than 160 pounds saving per airplane.
Fuel Saving: At today's fuel prices the window plug installation can pay for itself in less than two years.
Maintenance: The acrylic windows require inspection approximately every 3 years which can result in 25% of the windows being serviced or replaced. The Window Plug and Spacer Ring require a visual inspection every six years with likely no service or replacement.
Easy Installation: Simple as replacing a window. STC certified
Parasitic Drag: The deflection of the Window Plug under pressure is approximately 0.18 inches while the OEM acrylic window deflects 0.43 inches. Consequently the window plug produces less parasitic drag.
Aesthetics: A fully “plugged” freighter is aesthetically more pleasing
Painting: A fully plugged freighter is much easier, and consequently less expensive to
paint. Note, some converted freighters have painted over windows and window failures have resulted owing to an adverse reaction between the paint and the acrylic.
747 | 767 | 777 | 737 | 757 | A300 | CRJ-200 | Q400
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