Certified Engineering and Modification Support for Maintenance Organisations
MRO organisations require reliable, EASA-approved partners to implement aircraft modifications efficiently while maintaining full regulatory compliance.
SPAES supports Maintenance, Repair and Overhaul organisations as an integrated EASA Part 21J Design Organisation and Part 21G Production Organisation – covering engineering, certification and manufacturing from a single source.
We work as a technical partner to MROs, supporting modification projects during line and base maintenance, retrofit programmes and aircraft upgrades, without adding unnecessary interfaces or certification risk.
Design and Production Support for MRO Organisations
SPAES provides structured and certification-driven support for MROs across the full modification lifecycle:
- EASA Part 21J design support for Minor and Major Changes
- Part 21G production support for modification and retrofit projects
- STC development and approval support for MRO-driven programmes
- Engineering support for avionics, cabin and mission equipment modifications
- Structural and system modifications under EASA regulations
- Technical interface to CAMO and competent authorities
Our teams are familiar with maintenance-driven project constraints and support MROs with realistic engineering solutions aligned with operational requirements.
Typical MRO Use Cases
SPAES supports MRO organisations in a wide range of modification scenarios, including:
- Aircraft modifications during base maintenance
- Retrofit programmes for avionics and mission equipment
- Implementation of Minor Changes during scheduled maintenance
- Development and approval of STCs for fleet-wide upgrades
- Certification support for legacy aircraft and helicopter platforms
- Modification impact assessments and compliance demonstrations
We support both rotary-wing and fixed-wing aircraft, with a strong focus on helicopter fleets used in air rescue, special mission and commercial operations.
Why MROs Work with SPAES
- Integrated Part 21J and Part 21G approvals under one organisation
- Reduced interfaces between engineering, manufacturing and certification
- Direct technical communication – no consulting or reseller layers
- Proven experience with EASA regulations, Part-26 requirements and Special Conditions
- Certification-driven engineering aligned with maintenance environments
- Reliable support for both individual modifications and series retrofits
SPAES acts as a long-term technical partner, supporting MROs with compliant, implementable and authority-accepted solutions.
Selected Modification and Certification Projects
- AWIS integration (Minor Change) on BO-105 and EC135 helicopter platforms
- Life Raft System modification (STC) on EC155 helicopters in accordance with EASA Part-26
- Avionics and mission equipment retrofits on multi-type helicopter fleets
Our project experience supports MRO organisations with proven solutions and predictable certification outcomes.
EASA-Approved Partner for MRO Modification Projects
If you are looking for a certified design and production partner to support your MRO modification projects, SPAES provides engineering, certification and manufacturing capabilities under EASA Part 21J and Part 21G.
Contact us to discuss your MRO modification requirements and certification strategy.
