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I have received several questions about the snubber fitting, what it is and what is does, so here's a post to clear that up. The snubber is a brass fitting with some kind of restrictor built into it. Typically the restrictor is in the form of a porous stainless steel insert (see attached picture). The porosity of the insert allows pressure equalization on either side of the fitting but dampens out pressure spikes or transients resulting in a smoother and more stable readout on the cockpit indicator. For those having issues with the MP indication jumping around, especially during power changes, the snubber fitting will usually solve the problem.
Happy Flying,
Reggie
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