Write to the FAA with the request. Here is the format to use.

Hope this helps.

RL

============================

FAA Aircraft Registration Branch, AFS-750
Fax: 405-954-8068


FAA Aircraft Registration Branch, AFS-750
Registry Building Room 118
6425 South Denning
Oklahoma City, OK 73169-6937


FAA Aircraft Registration Branch,

Please cancel the registration of the following aircraft:
Registration: N217AW
Serial Number: ######## [Fill in]
Manufacturer: [Manufacturer / or name of builder]
Model: [Fill in]

This aircraft was [lost, stolen, exported, destroyed, a kit that was never completed, or other reason for de-registration. OR: This number was reserved but never assigned to an aircraft. Please release the reservation.]

Sincerely,

[Signed]

[Printed owner's name]
[Date]