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  #1  
Old 03-06-2021, 01:38 PM
DavidFrangos DavidFrangos is offline
 
Join Date: Feb 2021
Location: Indianapolis, IN
Posts: 3
Default Garmin GTP 59 Install

I am in the process of adding a garmin gtp 59 oat probe on a composite aircraft. The g3x manual states it needs to be mounted where there is significant wire mesh in the airframe.

I planned to I stall it next to the wheel well but the structure is only composite. Does it need a metal plate? Or a ground plane? Or can I drill a hole and install it directly through the fiberglass?

Thanks!
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  #2  
Old 03-06-2021, 02:26 PM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
Posts: 3,170
Default

The temperature probe should work without being grounded. But the installation manual says it should be grounded to the airframe. Perhaps for lightning protection? Maybe g3xpert will comment.
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  #3  
Old 03-07-2021, 02:23 PM
Avanza Avanza is offline
 
Join Date: Jul 2020
Location: Vastervik Sweden
Posts: 57
Talking GTP 59

The GTP 59 has a TSO for normal category aircraft.
It comes with a ring terminal for grounding.
Insert the probe and ring terminal into the hole in the skin of the aircraft.
Place the washer (5) over the end of the OAT probe on the outside skin of the aircraft. Thread the nut (4) onto the OAT probe. Holding the OAT probe on the inside, tighten the nut (4) to 100 inch-lbs. 20 inch-lbs.
It will work just fine.

Good luck
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  #4  
Old 03-10-2021, 10:12 AM
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g3xpert g3xpert is offline
 
Join Date: Sep 2010
Location: Olathe, KS
Posts: 3,015
Default GTP 59 Installation

Quote:
Originally Posted by DavidFrangos View Post
I am in the process of adding a garmin gtp 59 oat probe on a composite aircraft. The g3x manual states it needs to be mounted where there is significant wire mesh in the airframe.

I planned to I stall it next to the wheel well but the structure is only composite. Does it need a metal plate? Or a ground plane? Or can I drill a hole and install it directly through the fiberglass?

Thanks!
Section 21.3 is the relevant section of the G3X Touch Installation Manual in this case. We advise against mounting the GTP 59 in fiberglass only, in your case you will want to make use of a metal doubler, to address lightning concerns.

Thanks,

Justin
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  #5  
Old 04-07-2021, 03:52 PM
fabio fabio is offline
 
Join Date: Jan 2021
Location: italy
Posts: 22
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In which part of the aircraft is good to install the OAT probe?
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  #6  
Old 04-18-2021, 12:14 PM
FitzRX7 FitzRX7 is offline
 
Join Date: Jan 2013
Location: FL
Posts: 103
Default

A prominent install shop advised me to install it between the fuselage and the wing inside the fairing. And although it flies in the face of the install instructions it has worked as perfectly as they said it would, tons of air blows thru that area. YMMV.

Fitz
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