Reputable international air charter broker Chapman Freeborn frequently works with FBOs to improve the effectiveness and convenience of its operations for group air charter. When FBO is included on a check made out to Chapman Freeborn. Want to know what does fbo mean on a check for services rendered by a Fixed-Base Operator ? FBOs are equipped to handle various aspects of aircraft operations. This includes refueling, ground handling, and maintenance services. Chapman Freeborn may utilize these services to ensure smooth and efficient flight operations for their clients.