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century 21

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  1. C

    Garmin GI 275 interface with Century 21 AP. Coupled approach issues.

    Dear Piper People, I have a 1984 Piper Dakota and I recently installed a GNX 375 transponder/IFR GPS and a GI 275 ADAHRS+AP HSI unit. The GI-275 drives my original Century 21 AP - and in general, it's a great thing! Here's my question and quandary... After initial installation and checkout...