Você deve registrar um ônus contra a aeronave.
Avionics News publicou uma peça Legal Ease sobre exatamente isso, que vale a pena ler na íntegra:
If a lien is properly asserted, the lien claimant (the aircraft mechanic) has encumbered the aircraft in question, meaning the aircraft no longer has clear title.
Clear title is highly desirable to an aircraft purchaser, who can determine if an aircraft has any liens on its title through a simple title search. Once there is a lien on an aircraft, to sell the aircraft with clear title, the aircraft owner must obtain a release from the lien claimant. This means the owner must pay you for your services before they are able to sell the aircraft with clear title.
If the owner fails to pay the lien claimant to have the lien lifted, the aircraft will be sold subject to the lien. This means the aircraft does not have clear title, and although the aircraft will have a new owner, your lien will remain in effect.
Most buyers, however, will not purchase an aircraft subject to a lien, and thus, you usually will manage to receive the money owed to you when the owner decides to sell the aircraft.
If you do not want to wait for the aircraft to be sold to satisfy your lien, you can bring a foreclosure proceeding, forcing the sale of the aircraft, usually at an auction.
The proceeds from this sale go to the lien claimant to extinguish the lien. If the proceeds are greater than the lien, any money exceeding the amount of the lien goes to the aircraft owner. Additionally, if there are no bidders at the sale (an unusual occurrence), the aircraft may be given to the lien claimant for the price of the lien.
Uma coisa que vale a pena ter em mente, é a Lista de Aero Liens - um recurso gratuito que lista liens colocados contra proprietários de aeronaves . Se o seu novo cliente estiver na "lista de clientes inativos", convém pensar duas vezes antes de fazer a viagem ou receber o pagamento antecipado!
Você perguntou se uma garantia poderia ser registrada por um piloto por salários perdidos (em vez de uma mecânica por trabalho / peças perdidos); apenas procurando a lista acima para "John", encontrei pelo menos um piloto que tem dois ônus (contra empresas separadas) por salários perdidos: # 1 # 2
Outra garantia (PDF não disponível) lista a natureza da reivindicação como "Salário devido".