One DOA roof.
Every cert path covered.
Our EASA.21J.0892 Design Organisation Approval gives us authority to classify, engineer and issue most of our work without delegated involvement — so you don’t pay for the certification ping-pong.
// 01
EASA Part 21J Design & Certification
Engineering, substantiation and certification of modifications and repairs — minor and major — across airframe, systems, avionics, interiors and structures. Our EASA.21J.0892 design organisation approval covers transport-category aeroplanes and rotorcraft.
Brief us on this →- Minor & Major Change classification
- Supplemental Type Certificates (STC)
- Major Repair Design Approvals
- Structural substantiation & DTA
- Avionics & systems integration
- Interior reconfiguration & 9G testing
// 02
Airworthiness Consultancy
Independent senior engineers embedded in your project, your lease return or your fleet introduction. We map the regulatory delta, find the cheapest compliant path and own the paperwork to closure.
Brief us on this →- Lease transition / redelivery support
- Regulatory gap analysis (EASA ↔ FAA ↔ CAA)
- Continuing airworthiness review (CAMO interface)
- Type acceptance & validation
- ED Decision impact assessment
- Operator audit preparation
// 03
Programme Management
From kick-off through ground & flight test to TC issuance — one programme manager, one schedule, one risk register. We coordinate suppliers, MROs and authorities so your aircraft returns to revenue service on the day on the plan.
Brief us on this →- Master schedule & critical-path control
- Supplier & MRO coordination
- Authority liaison (EASA / FAA / CAA)
- Cost, scope & risk reporting
- Ground & flight test management
- Configuration & deviation control
// DOA fleet scope
Types we hold certification scope for.
Transport aeroplanes (CS-25)
- Airbus A220 / A320 family
- Airbus A330 / A340 / A350
- Boeing 737 NG / MAX
- Boeing 757 / 767 / 777 / 787
- Embraer E-Jet / E-Jet E2
- ATR 42 / 72
- Bombardier CRJ / Q400
Rotorcraft (CS-27 / CS-29)
- Leonardo AW139 / AW169 / AW189
- Airbus H125 / H135 / H145 / H160
- Bell 412 / 429 / 525
- Sikorsky S-76 / S-92
Business aviation (CS-23 / CS-25)
- Bombardier Global / Challenger
- Dassault Falcon 7X / 8X / 6X
- Gulfstream G450 → G700
- Embraer Praetor / Phenom
// Programme cadence
Five phases. One programme manager. One number.
// 01
Brief & classify
Within 5 days of contact: scope, classification (minor/major/novel), preliminary cert basis.
// 02
Engineering & analysis
Detail design, substantiation, supplier choice, drawings released through our DOA-controlled library.
// 03
Ground & flight test
Where required: instrumentation, EMI/HIRF, function & reliability, flight test plan agreement.
// 04
Approval & issue
EASA Form 31 / Form 124 / STC. Configuration baseline locked. Operator documentation handed over.
// 05
Post-cert surveillance
Continued airworthiness support, in-service issue triage, post-design changes through DOA scope.