S4A
@s4a.es
S4A is an experienced aeronautical engineering company, granted as Part 21-J DOA by EASA. Established in 2007, we provide integral solutions to our customers. We work worldwide, based in Madrid (Spain). S4A is the first aeronautical engineering company in Spain to be granted with this certificate by EASA. Our services include minor and major modifications and repairs in cabin safety, structures, avionics, electrical systems and environmental control systems. We also get EASA certifications for STCs, and EASA / FAA validations. Additionally, we offer consulting and CVE services for aircraft modifications and upgrades, quality assurance system implementations and airworthiness management.
S4A's Company Logos


S4A's Brand Colors
Hex Code
Color name
RGB
HSL
CMYK
#022267
Midnight Blue
2, 34, 103
221, 96, 21
98, 67, 0, 60
#FFFFFF
White
255, 255, 255
0, 0, 100
0, 0, 0, 0
#213C6D
Astronaut
33, 60, 109
219, 54, 28
70, 45, 0, 57
About S4A
S4A is a leading brand in the aviation industry, offering comprehensive engineering services for the global aeronautical sector. As the first Design Organization Approval (DOA) company approved by the European Union Aviation Safety Agency (EASA) in Spain, S4A sets the standard for experience, efficiency, and excellence. Specializing in aircraft modifications and repairs, S4A also manages aeronautical production, adheres to strict quality procedures, provides aeronautical consultancy services, and serves as a dealer for top-notch equipment and systems.
With a track record of over 1000 successfully certified engineering projects and more than 4000 aircraft flying with S4A designs, the brand is trusted by industry professionals worldwide. At S4A, customer satisfaction is of utmost importance. The brand prides itself on adapting to customers' standards and needs, ensuring prompt responses and maintaining high-quality standards.
Their team of professionals undergoes integral development and is committed to engineering excellence, innovation, and corporate social responsibility. S4A aims to become a global leader in aeronautical engineering, offering proximate and top-quality services while nurturing talent and promoting employee well-being. Choose S4A for efficient technical solutions tailored to your requirements, backed by a passionate and customer-oriented approach.
Contact S4A today to experience their expertise firsthand
Company type
Privately Held
Year founded
2007
Company size
11-50 employees
