Q400
Effectivity
LiteAir has a window plug for every window position on the Bombardier DHC-8-400 (Q400) airplane.
The window plugs are CNC machined from aluminum. For additional weight saving a fiber glass reinforced, nylon spacer ring LAP5005 is used in lieu of the OEM acrylic middle pane.
Parts – Q400
The part numbers used at each window location are shown below.
|
|
| Machined Lightweight Window Plug |
| |
| Part Number |
Location |
LAP 4011-1 |
All window locations |
| |
| Spacer Ring |
| |
| Part Number |
Location |
| LAP 5005-1 |
All window locations |
| |
Weight: The LiteAir Window Plug weighs 1.4 lbs. The LiteAir Spacer Ring weighs 0.3 lb.
Installation: The LiteAir Window Plug and Spacer Ring are installed per LiteAir’s STC. The STC installs the components per the OEM Maintenance Manual using the existing seal and retaining assembly.
Maintenance: Visual Inspection at each ‘D’ check. The STC allows for component repair.
Advantages – Q400
Weight: The weight of the LiteAir Window Plug installation is 2.5 pounds less (per window) than the OEM acrylic window installation. This can produce more than 140 pounds saving per airplane.
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 0.11 inches while the OEM acrylic window deflects 0.26 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
|
