Our Global Maintenance Agreement (GMA)
The Global Maintenance Agreement (GMA), commonly known as ‘Power By the Hour’ (PBH) is an innovative concept to provide our operators with customised and flexible solutions for on-aircraft and off-aircraft maintenance.
For 20 years, through the GMA, we have contributed to reducing operators’ maintenance costs and boosting their operations.
This highly flexible solution allows us to meet a wide range of airlines’ specific needs (based on the operator’s choices in investment, local resources, aircraft fleet, expected use, and on-site stock protection level).
Time & Material solutions
The SPOT Agreement is a creative and customised maintenance service dedicated to customers interested in a very flexible arrangement, a short-term but renewable agreement with specific conditions. The services offered on a time and material basis cover:
- Line-Replaceable Units (LRU) repair and overhaul
- Main elements for overall campaign
- Spare parts availability thanks to LRU standard exchange
On-site support
- ATR offers an extensive range of services for a quick aircraft return-to-service.
- Under an EASA Part 145 agreement, or another local agreement when required by local authorities, ATR-approved maintenance organisations (also called Working Parties) can support operators and lessors in the performance of:
- Aircraft transition package
- Technical assessments
- Technical assistance and aircraft return into service
- Aircraft repair
- Service Bulletins (SB)
- Design Organisations Approvals (DOA) modifications embodiment
- Scheduled maintenance
Ensuring Continuous Airworthiness with OEM Expertise
As an aircraft manufacturer, we offer CAMO (Continuing Airworthiness Management Organisation) services under an EASA Part M certification, that goes beyond basic compliance; we deliver confidence.
Our team supports operators by managing every aspect of airworthiness, from tailored maintenance programmes to regulatory oversight and documentation control.
With access to fleet-wide data, proprietary engineering insights, and real-time regulatory updates, we ensure your aircraft remain not only airworthy but optimised for performance, availability, and value retention.
Our CAMO services include:
- Full aircraft recovery / delivery and certification to meet customer needs
- Operator organisation assessment
- Phase-in / phase-out support
- Lease condition monitoring
- In-service fleet Continuing Airworthiness Management under operator’s responsibility
Integrated within the ATR eco-system (engineering, supply chain, safety, airworthiness, quality) our CAMO services optimise fleet usage, performance, and maintenance costs while helping your operations stay safe, compliant, and efficient.

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Aircraft Upgrades: ATR solutions
We support our customers in their business development through upgrade solutions enhancing passenger experience, aircraft performance and optimal adaptation to airlines’ requirements.
By choosing ATR Retrofit Solutions, airlines benefit from OEM-certified quality, continuous compliance with airworthiness and regulatory evolutions, and high performance standards. Aircraft documentation is automatically updated, simplifying configuration tracking and making future maintenance tasks easier to manage.
Leveraging the manufacturer’s expertise enables operational optimisation, fleet harmonisation, and reduces direct maintenance costs, creating long-term value for customers.
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