172L, 172M SN(17260759 - 17261898), F172L (1720805-1720904), and F172M (1720905-1721034)
Air Plains Model Eligibility
APS-STC
172B, 172C, 172D, 172E, 172F, 172G, 172H, 172I, 172J, 172K, 172L, and 172M
models are approved when any of the following STC is incorporated:
SA4428SW
If required, FAA Form 8130-3 must be requested. All other documents will be provided in digital format to your e-mail after check-out or provided with the shipped item.
Installation of an Air Plains airbox support bracket will improve the useful life of the airbox. Hardware pictured is included and is all that is needed for replacement of existing bracket.
Chromoly Steel Design
Air Plains Bracket features a steel upper bracket, improving the strength where it matters most.
Stress on Airbox Collar
When the airbox and bracket are installed on the engine, but don’t fit well, the airbox collar and bracket attachment points are highly stressed. Since both these components attach to the engine they also experience significant vibration which adds to the stress in these areas.
Adjustable Bracket
The factory brackets and airboxes have significant variability and do not fit well on the engine. In fact, we have measured many brackets and found nearly ¼” variation in bracket heights. Air Plains Bracket is adjustable during installation which compensates for any misalignment in height.
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