In order to secure a lien on an aircraft, an original [[Security Agreement]] should be sent to the Aircraft Registration Branch. The [[Security Agreement]] must include: * The names of the parties to the agreement * Words stating the aircraft owner grans the secured party an security interest in the collateral * Identify the collateral by manufacturer name, model designation, serial number and N-Number * Contain the ink signature of the debtor/aircraft owner(s) showing signer's title, as appropriate. * Include a recording fee ($5.00) for each item of collateral (aircraft, engine, propeller or location). * Check or money orders should be payable to Federal Administrative Aviation. The FAA provides AC Form 8050-98, as a sample aircraft security agreement that may be used if it meets the needs of the state or local jurisdiction and the needs of the parties. The FAA's website, including links to its registry to look up N-Numbers is: https://www.faa.gov/licenses_certificates/aircraft_certification/aircraft_registry/record_security_agreement