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Cabin Interior Modifications

STC Twenty One have extensive knowledge of VIP interiors and bespoke minor cabin interior modifications on a wide variety of Aircraft.

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Cabin Interior Modifications

Services & Approvals

Provides minor design changes and  supplement type certified approvals for all required interior changes. STC Twenty One can liaise and support with 25.853 flammability testing.

STC Twenty One have approved the following and many more. For all STC Approvals held by STC Twenty One refer to this documentMOD STORE. Contact STC Twenty One for 1200+ minor design changes.

  • Over 15 full VIP interiors from small narrow body to wide body aircraft.
    CLASS E freighter conversions and numerous transportation of horse and other animals STCs.
  • Significant amount of aircraft LOPA reconfigurations.
  • New livery drawings.
  • Replacement of Seat Foams and dress Covers.
  • Internal/External Camera Surveillance systems over a wide range of aircraft types.
  • Extensive knowledge on In-Flight Entertainment (VIP and airline) including WIFI.
Speak to the Team
cabin modification interiors stc twenty services

Cabin Interior Modifications

Speak To The Team

Our team members have combined 100+ years in the industry with experience of design/build of new galleys.


Simon Gaughan

Lead Mechanical Engineer

UK CAA Approved Design Organisation

STC Twenty One

All aircraft modifications and aircraft repairs are managed by our UK CAA approved Design Office represented by STC Twenty One (UK.21J.0198).

What We Offer


STC Twenty One Limited holds a Part 21 Subpart J DOA enabling it to certify UK CAA approved STCs and Major Repairs. Additionally, where a design change or repair is classified as minor, STC Twenty One Limited is authorised to approve them under the DOA using approval reference UK.21J.0198 through CAA.

Our employees are spread across our Avionics, Mechanical, Quality and Commercial Teams with a high level of experience and certification enabling the company to perform specialised services on engines and aircraft. Read more about our Services.

Get in Touch

Contact Us

Need more information or want to arrange to meet us?

+44 1332 576830

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