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  Catalog > Customer Account Tools > SNX-Ownership Xfer Plans/Kit/Flying Aircraft Ownership Transfer

Buying Previously Owned Sonex Plans and Complete Kits:

Sonex Plans that have not been used to build an Airframe may be resold. In order for Sonex, LLC to recognize the transfer of ownership, three actions must be taken. One by the Seller and two by the Buyer:

Seller: The Sonex Articles of Agreement and Waiver of Liability requires the seller to notify Sonex, LLC of the ownership transfer in writing. This is most easily accomplished by messaging and submitting documents to the Orders/Customer Service department via the Sonex Contact Form.

Buyer: The buyer (new owner) must sign and return their own completed copy of the Articles of Agreement and Waiver of Liability ( along with a $100 ownership transfer fee. Copies, faxes and email attachments are accepted, as long as they are legible. Please see the Payments Methods section of our Terms & Conditions for payment instructions. Please leave all seller signature lines blank. Sonex is always considered the seller and will sign the documentation when it is received. Note: If the buyer is purchasing a complete kit or flying aircraft, then a copy of the signed FAA Bill of Sale (Form 8050-2) must also be included with the Planholder Buyer Agreement. The FAA values the chain of ownership with all kit aircraft and aircraft registration can become very difficult if this chain is not documented by all owners. We encourage all individuals involved the ownership transfer process to visit ( for more information on FAA requirements.

If you did not receive the original document form the seller, or do not have access to it, Sonex will re-initiate the chain of ownership by issuing a new copy to the original owner. From there, it is the responsibility of the new owner to ensure all previous owners are documented and signed.

Once the signed Articles of Agreement and Waiver of Liability and ownership transfer fee are received from the new owner and written notice of the transfer of ownership is received from the seller, the new owner assumes all of the rights and privileges of the original purchaser with two exceptions:

  • No parts exchanges are accepted from second-hand kit/parts owners.
  • Part warranties are not transferrable to new owners.

Other Notes on Plan Transfers:

  • Ownership transfers typically take 5-10 business days to process, beginning from the first day that all requirements are received by Sonex staff.
  • Once a transfer is complete, you will be notified via email with a PAID invoice for your ownership transfer fee. Upon receiving this email notification, you will be able to create a Sonex Web Store account and be granted Sonex aircraft Plans Owner membership status, allowing you to access all restricted Web Store product categories.
  • Access to technical support, or placing of orders will not be allowed until the ownership transfer process is complete.
  • Complete Sonex Kits share the serial number of the set of plans they are purchased under. Therefore, whenever a Sonex kit is re-sold or transferred, the set of plans they are purchased under is part of that transaction and must remain with the kit.
  • Any amount due to Sonex under the Serial Number must be paid before an ownership transfer is allowed.
  • Any Sonex aircraft that is known to have been heavily damaged in an incident or accident is not eligible for ownership transfer. Component parts may be salvaged from the aircraft and used on a new serial number purchased from Sonex.
  • The last registered owner of the plans will be held accountable for any use of the plans or parts that violate intellectual property laws and/or Articles of Agreement and Waiver of Liability terms.

International Ownership Transfer and Plans Building Availability: Sonex Plans Ownership Transfers are only available to customers in the United States, Canada, Australia and New Zealand. Complete Airframe Kit and Sub-Kit projects along with flying aircraft are eligible for transfer in all countries worldwide.

Buyer beware: Only one set of Sonex Spar Caps are sold per plan serial number. It is the buyer's responsibility to check with Sonex, LLC to ensure Spars have not been previously sold under the prospective buyer's serial number.

Make Sure You're Getting a Good Deal: Read Sonex guidance on Buying New vs. Used kits and aircraft.

Buying Flying Sonex Aircraft:

Any Flying Sonex Aircraft carries the Serial number of the Sonex Plans used to build it. In order for the flying aircraft ownership transfer to be recognized by Sonex, LLC the procedure for Buying Sonex Plans (above) must be followed by Buyer and Seller. The Sonex Plans (print set) must travel with the aircraft being sold. It is the responsibility of the buyer to make sure the plans are with the flying aircraft at all times. Part warranties are not transferable to new owners, and parts exchanges are not accepted.

Note: we recommend that all Sonex Aircraft owners utilize their own buyer agreement when selling Experimental Amateur-Built aircraft, such as the template provided by EAA on their Members Only web site (log-in required):

This, and all other transactions subject to Sonex, LLC's full Terms & Conditions.

SKU: SNX-Ownership Xfer
Price: $ 100.00
Plans Serial Number
(NOT your FAA N-Number) * REQUIRED *

Is this aircraft completed and flying?

Seller Name * REQUIRED *
Buyer Name * REQUIRED *
Buyer Agreement Has Been Submitted?

Seller Notification or FAA Bill of Sale
Has Been Submitted? * REQUIRED *

Submit Comments About Your Transfer: 
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