Supporting Europe’s first B777-300ERSF into service

The recent introduction of the first Boeing 777-300ERSF ‘Big Twin’ freighter into the Challenge Group fleet, as well as the first of its type operating in Europe, represents an important milestone in the evolution of long-haul cargo. As airlines transition toward more efficient widebody freighters, the technical and regulatory complexity surrounding passenger-to-freighter (P2F) conversions has increased significantly.

For Air Worthy, acting as sub-contracted Continuing Airworthiness Management Organisation (CAMO) to Maltese registered Challenge Air Cargo, the project presented an opportunity to apply deep technical oversight, structured airworthiness management, and close collaboration with industry stakeholders to ensure a seamless and compliant entry into service.

P2F conversions are among the most complex aircraft modification programmes. Converting a widebody aircraft into a high-capacity freighter involves structural modifications, cargo system installation, avionics updates, and extensive certification activity. From a CAMO perspective, the conversion is not only a modification programme but a full lifecycle airworthiness management project, that requires coordination between airline operator, MRO, lessor, and the relevant NAA(s).

In this case, the original B777-300ER passenger-configured aircraft underwent conversion to 300ERSF ‘Big Twin’ freighter to provide exceptional cargo volume and efficiency for long-haul logistics operations. Air Worthy’s role was to oversee the continuing airworthiness aspects of the aircraft throughout the conversion process and ensure that it could transition smoothly into service under Challenge Air Cargo’s Air Operator Certificate.

Air Worthy’s role as CAMO

As a strategic CAMO specialist for several international customers, Air Worthy was responsible for managing and coordinating the regulatory and technical airworthiness framework associated with the aircraft during and after conversion. This included oversight of all modifications, compliance verification, and the proper recording of all structural and system changes.

Configuration and records management

Maintaining a clear and accurate aircraft configuration is essential when transitioning from passenger to freighter configuration. Air Worthy ensured that all technical records, modifications, and component installations were fully documented and traceable, within the aircraft’s continuing airworthiness records.

Coordination with stakeholders

The conversion involved multiple parties, including the aircraft lessor, the conversion organisation, maintenance providers, and the aviation authority responsible for oversight. Air Worthy served as the technical liaison between these stakeholders, ensuring that communication was aligned with regulatory and operational requirements.

Airworthiness review and regulatory compliance

Before entry into service, the aircraft required a comprehensive review to verify compliance with all applicable airworthiness directives, service bulletins, and modification approvals. Air Worthy managed this process and supported the necessary regulatory approvals required for the aircraft to be placed on the operator’s certificate.

Maintenance programme development

Transitioning to a freighter configuration requires updates to the Aircraft Maintenance Programme (AMP). Air Worthy supported the integration of the converted aircraft into Challenge Air Cargo’s maintenance framework, ensuring that maintenance tasks, inspection intervals, and reliability monitoring reflected the aircraft’s new operational profile.

Preparing for operational service

The transition from conversion facility to operational cargo aircraft requires careful planning and technical preparation. Air Worthy supported several key elements to ensure operational readiness.

• Establishing the aircraft’s airworthiness status following conversion

• Ensuring completion of all mandatory inspections and compliance items

• Validating weight and balance data following structural modification

• Verifying all EASA mandates were complied with for the import into EU

• Integrating the aircraft into the airline’s reliability and maintenance monitoring programmes

Through structured oversight and documentation control, Air Worthy ensured that the aircraft could enter service with full regulatory compliance..

Supporting cargo fleet modernisation

For cargo operators, the introduction of next-generation freighter aircraft represents a strategic investment in efficiency and capacity. Aircraft such as the converted B777-300ERSF offer significant advantages in payload capability, cargo volume, and fuel efficiency compared with older freighter types.

However, these programmes also require technical and regulatory challenges that must be carefully managed.

As a respected international provider of CAMO and technical services to airlines and lessors, Air Worthy has developed its position as a specialist in the complex process of passenger to freight (P2F) conversion programmes.

Air Worthy’s Airworthiness Manager, Lucia Soffientini, said:

“Air Worthy’s CAMO service is designed to support operators through complex aircraft transitions. By combining technical expertise, regulatory knowledge, and structured project oversight, our expert team ensures that modifications, conversions, and fleet introductions are delivered safely and efficiently. Air Worthy is proud to support Challenge Air Cargo in managing the continuing airworthiness of its growing freighter fleet and contributing to the introduction of this advanced cargo platform.”