Tag Archive for: Supplemental Type Certificates

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 has successfully obtained EASA approved Supplemental Type Certificates (STCs) for Boeing 737NG galley replacement.

Galley installations (or replacement galleys), whether driven by factors such as damage beyond economic repair, alternative arrangement needs, or operational requirements for new operators, are essential to aircraft functionality. Sometimes, operators require specific galley insert arrangements that are difficult or impossible to achieve through galley modification. In such cases, the only viable solution is to replace the unit. AES not only prepares the engineering but also provides the necessary parts, including any structural and electrical provisions. We go the extra mile, performing any associated changes in the cabin, particularly in the areas local to the galley if required. This ensures a seamless transition, even if a new G2 galley, for instance, is larger or smaller than the original unit.

Our latest STCs provide the perfect solution:

EASA STC No. 10080018 – G1 and G2 galley replacement
EASA STC No. 10080919 – G4 galley replacement
EASA STC No. 10081077 – G7 galley replacement

Aidan O’Leary, Director of Engineering – Ireland, comments:

“We proudly lead the way in aerospace engineering, and our latest EASA STCs for the replacement/installation of Boeing 737NG family galleys are a testament to our unwavering commitment to revolutionizing aircraft interiors. As an industry leader in certified aerospace design and engineering, AES has achieved a remarkable milestone of over 3,000 successful interior cabin modifications. We are dedicated to delivering high-quality, cost-effective solutions that continuously adapt to the dynamic demands of the aviation industry.”

STC for replacement of G1 and G2 Galleys - B737NGSTC for replacement of G4 Galley - B737NGSTC for replacement of G7 Galley - B737NG

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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!