What's the surprize inside?

I promised an update once the 90 degree AN fitting was cut open. Special shout out to Dave A for getting the fitting cut open to reveal the blockage. Thanks, Dave!

First, some explanation on what's blocking the air passage through the fitting. The AN fitting attached to the MP gauge has a restrictor built in to it to keep the flow and MP gauge needle swing dampened. As the restrictor failed it slowed the needle movement, and upon total failure it stuck the needle in place. A change of the fitting has the gauge working normal once again but this fitting does not have the restrictor. More research to find if it's really necessary or not.

Thanks to the Commander Owners Group (COG) for providing the info on the restricted fitting.