KF Aerospace has announced the successful certification of the world’s first Boeing 737-800 Combi conversion, marking a major advancement in global aircraft modification capability.
Transport Canada has officially approved the modification with the issuance of a Supplemental Type Certificate (STC #SA25-72), clearing the way for the aircraft to enter service.
The newly certified 737-800 Combi integrates a unique multi-role configuration, featuring a forward cargo compartment with five pallet positions and a 90-passenger cabin in the aft section.
This innovative layout makes it the first B737-800 aircraft of its kind anywhere in the world, with no comparable Combi currently in operation in the U.S., Europe, or other international markets.
The first aircraft was completed and delivered to Air Inuit in October 2025 as part of the airline’s fleet modernization.
The 737-800 Combi STC further expands the aircraft’s versatility, building on the proven utility and reliability of the AEI 737-800SF large cargo door. Its certification marks another milestone in the successful collaboration between KF and AEI.
Robert T. Convey, Senior Vice President at AEI says: “The achievement of the 737-800 Combi underscores the power of a true partnership that KF and AEI have enjoyed over the course of three decades.
“By combining AEI’s cargo door conversion expertise with KF’s engineering and operational strengths, we are able to deliver a world-first Combi that unlocks new possibilities for operators worldwide.”
Completion of the program required a substantial redesign of the aircraft’s interior and systems to meet stringent certification requirements.
KF Aerospace engineered and integrated fire detection, halon-based fire suppression, and advanced smoke-containment systems for the forward cargo section, while also modifying existing freighter-specific detection systems to meet Combi-specific criteria.
The effort resulted in the creation of hundreds of new parts and custom-engineered solutions to make this technically complex modification program possible.
The project is a testament to the advanced capabilities of KF’s in-house engineering department. KF’s manufacturing, installation, and test teams also played critical roles throughout the conversion.
Gregg Evjen, President of KF Aerospace, says: “This project reflects the ingenuity, dedication, and deep technical expertise of our entire team.
“KF is proud to deliver a world-first solution that expands what’s possible in aircraft conversion and supports our customers’ complex operational needs.”
