G5 install...optional GAD 13

Discussion in 'Avionics and Upgrades' started by Mike Meyer, Apr 20, 2020.

  1. Mike Meyer

    Mike Meyer Filing Flight Plan

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    Aircraft is currently down for annual and wanting to try to get my G5 DG/HSI installed with the GAD 13. In terms of quick turn around, is a 337 required for the straight DG install vs putting the GAD 13 in? Since the OAT is the only airframe modification?
     
  2. Salty

    Salty Final Approach

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    It’s an STC. My IA says that means it requires a 337
     
  3. Nathan Miller

    Nathan Miller Pre-takeoff checklist PoA Supporter

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    So, you're talking about putting in the G5 HSI along with the GAD 13 and GTP 59? The G5 is approved via an AML STC. If your aircraft is on the approved model list, you're good to go. Your IA installs it, you redeem your STC permission letter from Garmin and your IA files the 337.

    If you install the G5 now (along with filing the 337) add the GAD 13 and GTP 59 later, I believe that's considered a minor modification and requires only a logbook entry. I would have a hard time believing a 337 would be required.

    The installation of the G5 triggers the 337. I'm not sure where the "quick turn around" comes into play. Your IA mails it to the FAA, signs your logbook, approves your plane's return to service, and you fly away. There is no delay. The FAA doesn't need to mail back a confirmation or anything.
     
  4. Nathan Miller

    Nathan Miller Pre-takeoff checklist PoA Supporter

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    Btw - I see this is your first post. Welcome to POA. Good group of peeps here. Keep us posted on your install. I just went through it myself in my C172N. (Self install under my IA's supervision)
     
  5. WannFly

    WannFly Final Approach PoA Supporter

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    Welcome to POA.
    I did the OAT probe not too long ago, don’t remember getting a 337 for it. Just a lot book entry
     
  6. Timbeck2

    Timbeck2 Final Approach

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    Where did you install the OAT probe. I'm contemplating that now. The instructions say "preferable under the wing and at least two feet outboard from the wing root."
     
  7. Nathan Miller

    Nathan Miller Pre-takeoff checklist PoA Supporter

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    That's exactly where I put it. Above the strut so I wouldn't whack my head on it :)
    Screenshot_20200421-105208_Gallery.jpg
    25.875" to be exact....
     
  8. Nathan Miller

    Nathan Miller Pre-takeoff checklist PoA Supporter

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    I debated about installing it in the inspection panel. Of course, that would be easier for installation (no doubler required, allows for a future "undo", etc). I like having it in the skin. Seems more non-committal and less half @$$-ey. I may regret that decision down the road. Time will tell :rolleyes:
     
  9. Timbeck2

    Timbeck2 Final Approach

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    Sorry Nathan, I fly a Cherokee as does WannFly. However, why didn't you just install it on the inspection panel? One of the issues/questions is if a doubler is nessessary.

    edit: I see that you answered while I was typing.
     
  10. WannFly

    WannFly Final Approach PoA Supporter

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    on an inspection plate about 2 feet from the wing root. i will take a picture later tonight when i pay a visit to my avionics shop
     
  11. Nathan Miller

    Nathan Miller Pre-takeoff checklist PoA Supporter

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    Ah, yes. I see. I'll just take my ball and go home :p
    (Totally joking, btw. Sorry, I know sarcasm is poor form online since ya can never read the person's tone)

    And it looks like I anticipated your questions in the follow-up :)

    Oh look, coffee's ready. (Clearly, I am in need)
     
  12. Timbeck2

    Timbeck2 Final Approach

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    I know you fly an Archer. Inspection plate...is that the one that was added because of the wing spar SB?
     
  13. Timbeck2

    Timbeck2 Final Approach

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    No need...coffee yes but leave your ball. I know that you are required to know exactly which aircraft each poster flies according to the POA rules, but <whispering> I don't know either so don't feel bad.
     
  14. WannFly

    WannFly Final Approach PoA Supporter

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    most likely, but honestly i have no idea if thats a regular place for the plate or it was added after the fact.
     
  15. Nathan Miller

    Nathan Miller Pre-takeoff checklist PoA Supporter

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  16. WannFly

    WannFly Final Approach PoA Supporter

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  17. Salty

    Salty Final Approach

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    I put mine on the belly back in the tail behind the cargo area. I had wisely left some wiring in place from a remote compass I had removed a couple years ago and was able to use it to wire the probe to the GAD under the console.
     
  18. Timbeck2

    Timbeck2 Final Approach

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    Wouldn't the concern be that along the center line you wouldn't get an accurate reading because of the engine heat/exhaust?
     
  19. Timbeck2

    Timbeck2 Final Approach

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    I've already got everything including the Davtron probe. Looks like I'm going to have to splice wire onto it (allowed) since the wiring isn't long enough.
     
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  20. Salty

    Salty Final Approach

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    I mounted it on the opposite side from the exhaust and it's still just under the wing so well shaded. No way the exhaust is effecting it.
     
  21. ISU_Radar

    ISU_Radar Pre-Flight

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    On my Arrow II they also installed the temp probe on the belly of the tail well behind the cargo area. I would think it is far enough away from the exhaust to be unaffected by it in flight. Also it was probably easier since the shop was already back there installing the GFC 500 servos.
     
  22. WannFly

    WannFly Final Approach PoA Supporter

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    i think my servos are all being installed under the seat as per the install document, arrow could be different though
     
  23. ISU_Radar

    ISU_Radar Pre-Flight

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    The roll servo is under the seat, but my pitch and trim servos are in the tail.
     
  24. ISU_Radar

    ISU_Radar Pre-Flight

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    IMG_0647_small.jpg

    Would help if I actually uploaded the picture I intended to...
     
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  25. Timbeck2

    Timbeck2 Final Approach

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    Nice board! I have a similar set up with two 1x6 boards because I have to crawl back there to disconnect and install RG400 cable. We call it the "hell hole" as its cramped and hot.
     
  26. WannFly

    WannFly Final Approach PoA Supporter

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    Here ya go

    [​IMG]

    [​IMG]

    [mention]Timbeck2 [/mention]
     
  27. ISU_Radar

    ISU_Radar Pre-Flight

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    Fortunately, it wasn't me crawling back there, but this smaller guy at the shop I took it too. I actually watched him climb in the tail to adjust a cable when I took delivery. And that was only through the battery access hatch. We weren't sure if he was going to make it out. :)
     
  28. Timbeck2

    Timbeck2 Final Approach

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    Thank you sir, appreciate it. Your Archer has more inspection panels than my Cherokee.
     
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  29. Arrow76R

    Arrow76R Pre-takeoff checklist

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    The OAT probe for my G5 HSI installation ('69 Arrow 200) was just as the instructions suggest. Bottom of left wing (out of direct sunlight as the probe has no shield) about 2 feet from the wing root. I didn't see the installation but it appears that there is a small "doubler" riveted in place with the probe centered. There are access panels in the wheel well through which the location was reached.
     
  30. Timbeck2

    Timbeck2 Final Approach

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    Just finished mine. Installed the Davron temp probe in the strut access panel instead of monkeying around with a doubler and another hole in the wing. Waiting on a couple of breakers to complete the install and I'm ready to fly. I:

    1. replaced the old Narco 12 with a Garmin 430W
    2. replaced the old Narco 810 transceiver with Garmin GTR 225
    3. replaced all the old RG58 with RG400 cable
    3. installed the temp probe and GAD13 to receive wind direction and speed for TAS along with OAT
    4. made bracket and installed a GAD29B so that things could talk to each other
    5. removed and replaced two antennas for the radios
    6. removed all the old fiberglass insulation except for that under the headliner and replaced with sound deadening foam/aluminum skin insulation
    7. removed the old tractor style gascolator and replaced with Steve's version (not as easy as I thought it'd be)
    8. removed the Narco DME since the 430 provides it and moved my transponder into the stack so now I only have one.
    9. replaced a broken (self-induced) fairlead in the tail (that was fun in the 95+ Arizona heat as was tying down all the cables)

    I now have a hole where the old VOR came out so I'm waiting for a cover along with the two breakers. Should be here by the end of the week. I hate empty holes so I guess that's where the new engine monitor will go in the future. After that with possibly installing a true trac AP, I'll finally be done with it.
     
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  31. WannFly

    WannFly Final Approach PoA Supporter

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    how much effort and cost is that?
     
  32. WannFly

    WannFly Final Approach PoA Supporter

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    are you sure? :D
     
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  33. Timbeck2

    Timbeck2 Final Approach

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    After the side panels were removed, about 2 minutes to remove all the old fiberglass insulation. Almost two days to install the sound deadening/insulation and it was a royal PITA to get it behind all existing wiring, fuel lines, around air ducts, etc. Cost was $72 a sheet plus shipping and I used 1 3/4 sheets. Labor - free but at a cost to my knees and shoulders.
     
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  34. Timbeck2

    Timbeck2 Final Approach

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    Of course not. ;)
     
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  35. WannFly

    WannFly Final Approach PoA Supporter

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    could you point me to where to buy the sheet? my side panels are already out ... :D
    does this require W&B update?
     
  36. Timbeck2

    Timbeck2 Final Approach

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    WannFly likes this.