directional gyro replacement

directional gyro replacement

My mechanic tells me that a replacement dg for my cessna 172N has to have a PMA or STC for that model.  Are there any dgs that have this other than the cessna replacement dg?  I would like to replace it with the Sigma Tek 4000HR-1 which has a reference marker.  Thanks

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Re: directional gyro replacement

Try this site:

http://www.sigmatek.com/pages/specs/sig … _gyros.htm

you can get answer to your question from Sigma Tek.

What  your mechanic is most likely referring to is panel tilt degrees for gyro mounting, and a specific part number.

Bill

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