Aircraft finance


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BOYANOV & Co. has extensive experience in aircraft finance. In this area, our lawyers are recognized for their expertise, pragmatism, and efficiency.

We provide legal support to:

  • international aircraft operating lessors on commercial, regulatory and tax aspects of aircraft and engines leasing to Bulgarian airlines;
  • aircraft owners on the sale of aircraft and associated lease arrangements;
  • banks, security trustees, and other financing institutions on aircraft-related loan arrangements and granting of security interests for aircraft and aircraft leases;
  • airlines on corporate and regulatory matters; and
  • creditors of insolvent airlines.

The firm provides advisory services on local legal issues arising from all types of aircraft-related transactions, including significant international aircraft financing. Based on its profound legal knowledge and devoted and innovative approach, the Boyanov & Co. team successfully assists its clients in the process of overcoming the legal challenges on the aviation market and achieving their business goals in a time- and cost-efficient manner.

Our services include:

  • developing letters of intent, memoranda of understanding, and term sheets;
  • negotiating and advising on operating leases, finance leases, and related corporate guaranties;
  • reviewing and advising on aircraft procurement and sale arrangements;
  • advising on engine swaps and pooling arrangements;
  • providing support for the improvement of foreign law security interests (such as aircraft mortgages, security assignments in aircraft leases, etc.);
  • working on the establishment of local law security interests (such as aircraft pledges and registered pledges on lease receivables) and advising on their foreclosure;
  • representing clients before the Civil Aviation Administration of the Republic of Bulgaria in relation to the improvement of security interests and/or ensuring compliance with relevant regulatory requirements;
  • providing legal opinions envisaged by transaction documents for the benefit of aircraft lessors, sellers, or lenders;
  • providing advice and supporting negotiations on settlements of disputes with Bulgarian airlines under effective aircraft leases;
  • assisting on the prompt repossession of aircraft by their owners; and
  • filing for relief under applicable double taxation treaties on behalf of aircraft lessors or lenders.
Please see also the Deals and Cases section.


  • IFLR1000 2022

    “The firm’s lawyers are competent in many business areas.  They clearly are business oriented and understand the client’s needs. Very efficient in respect of the deadlines.” – Project Development, IFLR1000 2022

  • IFLR1000 Financial and Corporate 2017

    “The firm has always provided superb legal advice. They are hands on and cost sensitive. They offer a broad spectrum of legal expertise and also give support on strategic and business issues.”

  • Chambers Europe 2016

    “Very good communication with understanding of the law, and what would work to our advantage. The analysis of the whole proceedings was excellent. We really appreciated the performance of this first-class firm.”

  • Chambers Europe 2016

    “The firm’s strongest points are business acumen and time keeping.”

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