Feasibility of Sharing a 430 W Between Planes

Discussion in 'Avionics and Upgrades' started by MBDiagMan, Feb 18, 2020.

  1. MBDiagMan

    MBDiagMan En-Route

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    It never occurred to me before, but the 430W unit easily removes from the tray. If I had a tray and installation in the other plane, how practical would it be to move it back and forth?
     
  2. Jesse Saint

    Jesse Saint Pre-takeoff checklist

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    As long as both planes have a 337 showing the installation per the STC, as long as you don't fly either without it (this would require additional paperwork), then there is no good reason you can't do this. You would want to make sure that the settings match from one plane to the other.

    One possible catch is that the CDI has to be calibrated to the 430W, so if one CDI is calibrated correctly, then the other may not be. It is not difficult to do, but would have to be verified each time you swap.
     
  3. Flybuddy

    Flybuddy Pre-takeoff checklist

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    I’ve got a neighbor who has 2 airplanes, one certified and one experimental who shares one 530W between the two. He’s done this for years with no issues.
     
  4. Ryan Klems

    Ryan Klems Pre-takeoff checklist

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    Only concerns I'd have (other than what Jesse mentioned above), is the potential for bending a pin with the frequency of swapping, chance of dropping and chance of static discharge. But otherwise should be workable.
     
  5. MBDiagMan

    MBDiagMan En-Route

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    Great point! I wonder if those adjustment is accomplished in the CDI or the 430. If it’s in the CDI then it’s no issue.
     
  6. frfly172

    frfly172 Touchdown! Greaser! PoA Supporter

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    Good question, if I had two airplanes it would be a consideration. I have a 430w and a530w so for the price of another tray ,it could work.
     
  7. Jesse Saint

    Jesse Saint Pre-takeoff checklist

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    I
    I think it is in the 430. The CDI is just a “dumb” unit. You set the CDI heading to 150 and you tell the 430 that it’s there. That’s all there is to it. This was just to make you aware that it must be done.
     
  8. MBDiagMan

    MBDiagMan En-Route

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    Makes sense. That makes interchange less practical.
     
  9. Jesse Saint

    Jesse Saint Pre-takeoff checklist

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    It only takes 30 second to do, though, and there is a chance that both indicators will agree.
     
  10. MajorTurbulence

    MajorTurbulence Pre-takeoff checklist

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    I remember having an audio panel problem that required sliding out the unit from the panel. Apparently, even though I was the owner, sliding it out was technically a no no my me, but only for a tech, as crazy as that sounds. Does that apply to sliding out/in a navigator from its slot as well?
     
  11. bradg33

    bradg33 Pattern Altitude

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    Read Part 43, Appendix A, Para. C and report back.
     
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  12. MajorTurbulence

    MajorTurbulence Pre-takeoff checklist

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    I see that item 31 indicates it is permissible. I wonder why my Avionics tech gave me a hard time over the phone.
     
  13. bradg33

    bradg33 Pattern Altitude

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    Because many (but not all) A&Ps and Avionics folks, and pilots for that matter, don't actually understand what the regulations say and go solely off of what they were "told" by someone else.