Ammeter - Required?

[Bennett]

The '83 J has the low/high voltage light as part of the annunciator bar. The JPI. 830 also provides voltage information digitally, so there is redundancy here that I think is at least as useful as an ammeter in flight. I'm just concerned about "legality" in the eyes of our beloved FAA. I will ask one of my favorite avionics shop if they are willing to remove either the ammeter or the OAT/EGT gauge and make the necessary log book entries.

[PTK]

Thanks for the clarification Byron. Makes sense.

And Bennett I totally understand your point! We have voltage readings in multiple places. I know in my airplane I have 3 sources for bus voltage not counting the hi & low volt in annunciator panel!

It'd be interesting to find out.

[fantom]

I have 4 sources of OAT! The Mooney one in the side window, the Aspens each have their own and now the JPI has added another one! Too many of them -- at least they agree...

Perhaps because they all use the same probe.

[Marauder]

I have 4 sources of OAT! The Mooney one in the side window, the Aspens each have their own and now the JPI has added another one! Too many of them -- at least they agree... Perhaps because they all use the same probe.

Nope... The Aspens each have their own sensor: The Mooney is that lovely "through the side window" mechanical gizmo and the JPI has it's own -- which brings up a question. Where did the mechanic mount your JPI OAT probe? Mine is on the wing!

[TWinter]

Nope... The Aspens each have their own sensor: ImageUploadedByTapatalk1370364205.496308.jpg The Mooney is that lovely "through the side window" mechanical gizmo and the JPI has it's own -- which brings up a question. Where did the mechanic mount your JPI OAT probe? Mine is on the wing!

He mounted mine pilot's side near the cowl access panel for brake fluid.

[Marauder]

He mounted mine pilot's side near the cowl access panel for brake fluid.

 

Interesting. Thanks! Wonder where JPI says to mount it. Will need to go find the installation instructions...

[fantom]

My JPI sensor, surprise, is in the pilot side air scoop. Very easy installation, but is was the first JPI ever installed on a new plane at the factory.

 

Also, contrary to some reports, my OE temp gauge and my JPI have always agreed.

[Marauder]

Hmmm... Wonder why mine didn't go into the cool air scoop too...

[Cruiser]

My MSC told me the heat from the engine compartment would be enough to increase the temp readings. He installed it on the passenger underside wing in one of the inspection plates.

[Marauder]

My MSC told me the heat from the engine compartment would be enough to increase the temp readings. He installed it on the passenger underside wind in one of the inspection plates.

Looks like every mechanic has their preference for a location... Thanks for reply.

[Bennett]

Mine is installed in the same place as fantom.

[PTK]

My JPI sensor is in the pilot cool air scoop as well. My M655 sensor is in the pax air scoop! It is appreciably shorter than JPI's too.

[N1026F]

PM Don Muncy or call Dugosh--get it from the guru's then confirm their sources--that's due diligence.