Re-arranging instruments into a standard T

Discussion in 'Avionics and Upgrades' started by hish747, Jun 2, 2019.

  1. hish747

    hish747 Pre-takeoff checklist

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    Hi All,
    I just bought a 1967 Cessna 150H with an old school instrument panel layout. I'd like to rearrange the instruments into a more standard T configuration.

    If I want to rearrange without any modifications to the panel, would a 337 be required or just a logbook entry with an A&P or IA sign off? I would just be moving instruments into existing holes where they fit.

    Thanks!
    Hish
     
  2. Flybuddy

    Flybuddy Pre-Flight

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    IMO, logbook entry would suffice...You could get Mr. T to sign it off.
    mr t.jpg
     
  3. luvflyin

    luvflyin Final Approach

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    I dunno. Just wondering what you’ll do for a CDI if you want it IFR capable.
     
  4. alfadog

    alfadog En-Route

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    Sounds like a minor modification to me...
     
  5. Bell206

    Bell206 Cleared for Takeoff

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    I've found the answer to this question is subjective to the mechanic performing the work. There are several certification requirements in CAR3/Part23 for the instrument layout, but as long as the rearrangement doesn't affect any clearance issues behind the panel or require a structural change then I would lean toward a logbook entry only.
     
  6. Lachlan

    Lachlan En-Route

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    Do you have an A&P/IA in mind who will sign it off? Ask them. They will tell you what is required, if anything. Also, heed the suggestions you received from the 150-152 club board. Solid advice there. It ain’t gonna be quick, easy, or cheap (for what you ultimately get out if it) if you’re paying for labor.
     
    Last edited: Jun 4, 2019
  7. Salty

    Salty En-Route PoA Supporter

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    I'd be willing to bet this task is orders of magnitude more difficult than you think it is.

    They may all look like exactly the same size round doo-dads from the front, but in the back they are all sorts of sizes, some which may surprise you just how large they are. What fits now, may easily not (or not easily) fit where you want.

    Then there's wiring that won't reach, pitot static tubing that won't reach, etc, etc....

    Just figuring out what wire goes where and why is many hours of work. Crammed inside a small plane. WIth your arms up in a small hole. WIth poor lighting.
     
    Last edited: Jun 4, 2019
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  8. Timbeck2

    Timbeck2 Final Approach

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    Agreed. This has project creep written all over it especially if the pitot/static tubing and/or wiring is old.
     
  9. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser! PoA Supporter

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    Have done it. Big job. Many hurdles such as described above and I was struggling with vacuum line relocation, and not all instruments may have room to put them where you want them due to their depth. Some a/c have a control yoke that occupies the space where you want a deep instrument.
    I am told some parts of instrument panels are structural as well; you can't hack off metal just anywhere b/c it is needed to hold the left side of the airplane to the right side.
     
  10. Chip Sylverne

    Chip Sylverne En-Route PoA Supporter

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    Fear is the poison of our lives.
    Not worth the trouble. I had a Cherokee with an old shotgun panel that I got my IR in. It's all what you're used to. Save the money for gas.