Tag Archive for: Aircraft Lessors

Aerospace Engineering Solutions (AES) has collaborated with numerous airlines worldwide, providing EASA-approved Part 21J DOA support for exterior liveries and mandatory markings. Our extensive experience enables us to offer services for new and existing liveries, airline rebranding, and retro and promotional liveries.

Celebrating success with Brussels Airlines

We are proud to be part of this fantastic project for Brussels Airlines on ‘Amare’, the latest Belgian Icon! Our team provided the EASA-approved Part 21J exterior livery drawings for the Airbus A320neo. On April 26th, 2024, Amare (reg OO-SBB) took its inaugural revenue flight adorned with the captivating livery, symbolising the renowned music festival Tomorrowland.

Honouring heritage with TUI’s 50th anniversary livery

Another significant example showcasing our expertise is the TUI Boeing 737-8Max livery, designed to commemorate its 50th anniversary. Inspired by the airline’s rich history and vintage aesthetics, our team played a pivotal role in creating this livery, providing the EASA-approved Part 21J exterior drawings. We are honoured that TUI entrusted us, and we extend our warmest congratulations to them for this milestone.


If you have a requirement for aircraft livery design, contact us today!

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Is your Boeing 737NG cabin configurations in compliance with EASA regulations?


In response to the Certification Memorandum CM–21.A–CS–001 Issue 02, titled “Classification Of Design Changes To Cabin Interiors Of Large Aeroplanes,” released by EASA in April 2021, AES has successfully secured six Supplemental Type Certificates (STCs) for various seat type configurations on the Boeing 737NG, covering both 186 and 189 passenger configurations. Notably, the most recent STC covers the Safran Z100 series in a 189 configuration (STC Nr 10083547). AES is actively pursuing additional STCs, with several applications currently in progress.

The Certification Memorandum clarifies classification of changes to Cabin Interiors including the installation of seats that require a compliance statement against CS25.562, focusing on Emergency Landing Dynamic Conditions. It’s worth noting that this requirement has been a longstanding part of EASA Part 21 Appendix A of GM 21.A.91. However, with the release of CM–21.A–CS–001, EASA has clarified and reinforced the classification process for such changes, superseding past practices.

A key aspect highlighted in accordance with EASA B737 Type Certificate Data Sheet (TCDS) IM.A.120 is that most seating configurations for the B737NG family must meet the requirements for JAR25 Chapter 13, excluding certain clauses. This mandates the classification of these changes as Major (STC). It is important to mention the requirement provided in CS26.60 (Additional Airworthiness Specifications), which requires dynamically tested seats to be installed in configurations manufactured post-26th February 2021 to be compliant with CS25.562.

AES remains committed to delivering aerospace engineering solutions that not only meet but exceed regulatory requirements, ensuring the highest standards of safety and compliance in the aviation industry. For further details on these achievements, interested parties are encouraged to contact us below.

Aerospace Engineering Solutions introduces a minor modification for portable ELT installation to address EASA requirements with non-rechargeable lithium batteries (NRLB), eliminating the need for STC applications.

Meeting EASA requirements

EASA CAT.IDE.A.280(a) states that all aircraft with a Maximum Operational Passenger Seating Configuration (MOPSC) exceeding 19 must be equipped with at least one automatic ELT, with the provision of two for aircraft with Certificates of Airworthiness (CofA) issued before July 1, 2008. Automatic ELTs might be portable with lithium batteries as part of their design. Lithium batteries ETSO C142b non-compliant installation requires an STC application.

Minor modification for maximum impact

AES offers a minor modification package compatible with all aircraft types. Our comprehensive solution includes engineering support, portable ELT (Oriola) compliant with ETSO C142b, and an installation kit comprising bracketry and placards designed to meet NRLB installation requirements.

Benefits for operators and lessors

The beauty of the AES solution lies in its simplicity. Operators and leasing companies can now fully comply without the STC application process. This minor modification not only ensures compliance but also offers flexibility for fleet-wide adaptations or individual aircraft adjustments in the most cost-effective manner.

Minor Modification for Portable ELTs

To learn more about our solution and how it can benefit your operations, contact us today!

Aerospace Engineering Solutions and Air Worthy, Italian Continuing Airworthiness Management Organisation (CAMO), are delighted to announce a DOA & CAMO partnership.

Under the combined expertise of AES and Air Worthy, this venture seamlessly integrates the strengths of both companies in aircraft safety, design, and modifications. By harnessing AES’s unparalleled EASA Part 21J scope of approval and drawing on Air Worthy’s unwavering commitment to continued airworthiness, we’re paving the way for a streamlined process in serving airlines and aircraft leasing companies with their aircraft modification needs.

A formalised meeting took place at Air Worthy’s office in Lodi, Italy, on 11 September 2023, where both companies came together to chart a path toward excellence in aerospace engineering services. Present were notable representatives from AES: Anton Heissig, Director and Lola Lahoz, Deputy of Head of Airworthiness, and from Air Worthy: Gabriele Brescianino, Accountable Manager, Lucia Soffientini, Continuing Airworthiness Manager, and Samantha Orsini, Customer Relationship Manager.

Samantha Orsini kicked off the meeting with an insightful presentation about Air Worthy and a comprehensive dive into Air Worthy’s history, unparalleled CAMO services, team structure, and unwavering commitment to excellence, led by Gabriele Brescianino and Lucia Soffientini.

One common thread that ran through the meeting was the shared mission of both companies – a relentless commitment to delivering high-quality services with proven integrity and attention to detail. Quality assurance is a top priority for AES and Air Worthy, a cornerstone of their partnership.

The highlight of the meeting was the vision of a partnership gearing up to offer a comprehensive CAMO+DOA “package” to their customers, delivering a one-stop solution for their aviation needs. Already taking tangible form, the first collaborative project to kick off soon, where Air Worthy will tap into AES’s DOA expertise to support Avionics modifications, exemplifying this partnership’s proactive and dynamic approach.

Don’t hesitate to contact us if you need DOA and CAMO services for your aircraft fleet and would like to learn more about our collaboration services.

Welcome to AES Summer update 2023. We are thrilled to share how Aerospace Engineering Solutions, an industry leading Part 21J Design Organisation (DOA) have performed this year so far with ground-breaking expansion, growing customer base and capabilities, new additions to our team and much more!

AES Spain

Aerospace Engineering Solutions, newly launched in Spain, has marked a successful first half-year. Trading as AES Spain, the first DOA in Malaga and only the second in Andalucía has already yielded innovative solutions and established themselves as key players, focusing on cutting-edge aerospace technology and strengthening regional partnerships. Positive growth trends point to a promising future ahead. Read more here.

Supplement Type Certificates

Aerospace Engineering Solutions boasts 3000+ modifications and developed 70+ Supplemental Type Certificates (STC). Here’s a glimpse of some of the modifications and STC’s in our extensive portfolio. If you have a requirement for your fleet, don’t hesitate to contact us for further information and assistance.

EASA STC 10079922 Installation of Forward Cabin Closets for the B737NG Family. This modification installs seat track mounted underbin coat stowages to the forward left and right hand cabin area of the aircraft.

EASA STC 10080018 Replacement G1 and G2 galleys for Boeing 737NG. This change introduces a replacement galley in the G1 and G2 positions on the aircraft.

EASA STC 10080919 Replacement G4 galley for Boeing 737NG. This change introduces a replacement galley in the G4 position on the aircraft.

EASA STC 10081077 Replacement G7 galley for Boeing 737NG. This change introduces a replacement galley in the G7 position on the aircraft.

Don’t miss this opportunity to revolutionize your B737NG aircraft! Contact our team of experts today for more information.

International Women in Engineering Day 2023

Celebrating International Women in Engineering Day 2023 this year, our very own Lola Lahoz Nogales, Deputy of Head of Airworthiness & Design Office Manager – Spain, shares her experience and motivation within the airworthiness field as a woman and engineer in the aviation industry. Read more here.

Aircraft Lessor’s DOA Expectations

For over two decades, Aerospace Engineering Solutions has been at the forefront of supporting aircraft lessors and airlines, providing reliable, compliant, and cost-effective Part 21J design and engineering solutions, ensuring the airworthiness and safety of our customers’ aircraft. Discover how AES has been a trusted DOA partner and an essential extension of the aircraft leasing community. Read more here.

New Starters

Welcome to the AES Global team in Ireland. Cian and Aisha who will be embarking on their career journey as Graduate Design Engineers, and also Markian and Grainne as Student Design Engineers on their Co-Op/Internship placements.At AES, we foster an environment that encourages collaboration, innovation and personal growth within the aerospace engineering sector. We’re thrilled to have you join our incredible family of talented engineers. Together, we’ll achieve amazing things!

Upcoming Industry Events

In June, AES experienced great success exhibiting at the Aircraft Interiors Expo in Hamburg, with positive feedback and recognition from industry peers. We look forward to participating in upcoming industry events and showcase our Part 21J design solutions. Click here for upcoming events!

An aircraft lessor or airline typically looks for certain qualities in a DOA holder and there are many factors they consider important:

  • Compliance: The DOA holder should have a strong track record of compliance with regulatory requirements and standards set by aviation authorities. This ensures that the designs and modifications performed by the DOA meet safety and airworthiness standards.
  • Expertise and Experience: The lessor or airline will value the DOA’s expertise and experience in aircraft design, modification, and engineering solutions. A proven track record of successfully completed projects and a team of skilled professionals contribute to the DOA’s credibility.
  • Technical Capabilities: The DOA should possess the necessary technical capabilities and infrastructure to handle the lessor’s or airline’s specific requirements. This includes having appropriate design tools, software, testing facilities, and qualified personnel.
  • Flexibility and Responsiveness: The lessor or airline would prefer a DOA that can adapt to their needs and provide timely responses. Flexibility in accommodating modifications, efficient communication, and prompt delivery of design solutions are valued traits.
  • Cost-Effectiveness: While quality and compliance are crucial, the DOA’s pricing and cost-effectiveness also play a role. The lessor or airline will consider the overall value proposition, including the DOA’s pricing structure and competitiveness in the market

Ultimately, the Aircraft Lessor’s DOA expectations is to provide reliable, compliant, and cost-effective engineering solutions, ensuring the airworthiness and safety of their aircraft fleet.

Feedback from our customers is that AES meets all the above requirements and has been a trusted DOA partner, supporting aircraft lessors and airlines for over 20 years. We’re an extension of your team, offering expert assistance to help you soar higher. Contact our team today!

Explore our comprehensive Part 21J DOA services and wide range of aerospace products.