LTB400 Aviation Software GmbH Since 1984 LTB400 Aviation Software GmbH provides a Maintenance Management System for aviation companies in the repair and overhaul business (MRO). The LTB/400® is an, integrated modular and user-friendly state-of-the-art aviation software, continuously upgraded in partnership with our customers. The LTB/400® Maintenance Management System covers all functions of a Part-145 organization including CAMO- and Flight Operations modules. We are proud to count more than 100 German- and international aviation companies as our clients. The LTB/400® is in fact the market leader in the European German speaking community, and has a reputation for reliable and individual product support by our competent staff through our Hotline service.