MANCHESTER, United Kingdom (June 12, 2025) — STS Aviation Services (STS), a leading provider of nose-to-tail MRO solutions, has earned expanded approval under its CAA Part 21J Design Organisation Approval (DOA), unlocking new capabilities for turbine engine component repairs and modifications.
The approval marks a strategic step forward for STS’ UK-based design team, now authorised to develop and certify Minor Modifications and Minor Repairs on turbine engine nacelles, including air intake cowls, fan cowls, thrust reversers, and core cowls. The enhanced scope covers:
- Minor repairs and unrepaired damage approvals on metallic and composite secondary structures
- Modifications to existing structures, including replacement part design and installation
- Protective treatments such as corrosion-inhibiting compounds, sealants, and coatings
- Design and installation of aircraft liveries, placards, and exterior markings
“Our team has worked diligently to secure this approval, further reflecting our technical expertise and our commitment to delivering high-value engineering services to our clients,” said Ethan Steele, EVP & Head of Commercial at STS Aviation Services. “Every new approval expands our ability to engineer real-world solutions. We can better meet the needs of our airline and leasing customers faster, offering the safest most reliable options to reduce their operational disruptions.”
The new scope complements STS’ existing 21J capabilities, reinforcing the company’s commitment to offering agile, in-house engineering expertise across both airframe and engine systems. With this expansion, STS Aviation Services strengthens its position as one of the industry’s most comprehensive and responsive MRO providers, with design solutions that move at the speed of operations.
For operators facing AOG events, short lease transitions, or mid-life modification needs, the ability to self-certify structural and component repairs, quickly and compliantly, can make all the difference. This approval ensures STS can now deliver even more of those services under one roof.
To learn more about STS Aviation Services and its growing portfolio of CAA and EASA-approved engineering solutions, visit www.stsaviationgroup.com.
About STS Aviation Services
STS Aviation Services is the MRO division of STS Aviation Group, delivering nose-to-tail aircraft maintenance solutions to commercial and military operators worldwide. With state-of-the-art facilities across the globe, our team handles everything from line and base maintenance to complex structural repairs, modifications, and engineering programs. Backed by decades of experience and driven by a forward-thinking approach, STS Aviation Services is committed to keeping aircraft flying and operations running at full speed.
Media Contact
Bryan Shaw
Director of Marketing
STS Aviation Group
1-800-800-2400 ext. 8521
[email protected]
www.stsaviationgroup.com