Not to start another panel upgrade thread but,
Our 182P on floats has an HSI (edo aire 2331 or NSD360A). I am trying to get the part number.
The Point is it functions but intermittently, mostly full time now, the HSI flag is down.
S-Tec 50, 430W and a kx155 round out the stack.
Certainly the easy answer is a new panel, but this is a floatplane, occasional IFR.
Adding an ST901 and an FS210 would be nice, if the HSI was working fully.

So send the HSI out for repair to coax it along until a whole new panel can be sorted out
Or?


And who might do a good job on the old HSI?

Beyond economical repair. Put in a GI275. It will replace the HSI with solid state, and provide GPSS to the autopilot. It talks nice to the 430W and to the 50-2. There’s a weight and complexity saving. The HSI is going to require a lot of maintenance and frustrate you.

Any trouble after that and you add a second GI275. Then you can pull your TC, ALT, VSI, AS, and vacuum pump.

Pinecone wrote:Beyond economical repair. Put in a GI275. It will replace the HSI with solid state, and provide GPSS to the autopilot. It talks nice to the 430W and to the 50-2. There’s a weight and complexity saving. The HSI is going to require a lot of maintenance and frustrate you.

Any trouble after that and you add a second GI275. Then you can pull your TC, ALT, VSI, AS, and vacuum pump.

X2