imwithtuxedo
Pre-takeoff checklist
Any hiccups I should be aware of (STC permission, etc) in installing a used JPI830 in a Comanche that was previously installed in a Comanche?
Installing used JPI830
- Thread starter imwithtuxedo
- Start date
Randy Stuart
Filing Flight Plan
- Joined
- Sep 24, 2022
- Messages
- 10
- Display Name
Display name:
Idaho Maule
JPI 830 is not a primary instrument and will require a 337.
unsafervguy
En-Route
Maybe,maybe not. Is it a major alteration to install it? Depends on what has to be done to install it.
Randy Stuart
Filing Flight Plan
- Joined
- Sep 24, 2022
- Messages
- 10
- Display Name
Display name:
Idaho Maule
It's not on the TCDS so it's not a minor mod. You need a W&B change, a change on the equipment list, a pilots manual and a continued airworthiness list on the 337.
I believe the older 800s have the STC permissions in the install manual so using their instructions is no problem. As mentioned above whether a major or minor alteration will be up to your mechanic.
FYI: the TCDS doesn't determine whether a major or minor alteration. The Part 43 installer makes that determination. So whether a 337 is needed depends on that installer. But you definitely need the W&B calc, EL update, and ICAs.
Randy Stuart
Filing Flight Plan
- Joined
- Sep 24, 2022
- Messages
- 10
- Display Name
Display name:
Idaho Maule
If the plane came to me for an annual and I caught it I would not sign the plane off. The installer does not make the determination. Major and minor are determined by the TCDS and/or the part itself. Call the FSDO and get the information.
And thats your prerogative since its your certificate. Unfortunately, you may have a problem finding a regulation that would back that opinion up. But that would be between you and your customer. For me and my certificate and other APIAs there's been no issue making that determination based only on Part 43.
That's not the definition of a major mod. Just because the empty weight changes doesn't make it one either.
unsafervguy
En-Route
No, a major alteration is determined by far43 appendix A. Installing an appliance such as a gauge may or may not be a major alteration under appendix A a(1)(iii) depending on what is done to install it.