What must be done if APCH cannot clear an aircraft above 6,000 feet?

If approach control is unable to clear an aircraft above 6,000 feet, establishing the route and clearing the aircraft out of controlled airspace, such as above the designated Floor of ZFW (Zonal Flight Warnings), is the necessary action. This approach prioritizes the safety and separation of aircraft within the airspace while also ensuring that the aircraft can continue its flight as safely and efficiently as possible. By routing the aircraft appropriately and providing a clearance, air traffic control maintains separation from other traffic and adheres to established altitude and airspace regulations.

Other options may not provide the required clearance or could complicate the flight operation unnecessarily. Issuing an immediate descent might lead to an unsafe situation if there is ongoing traffic or obstacles below the requested altitude. Changing the destination could lead to confusion and delays without resolving the altitude issue. Delaying departure indefinitely is not practical and can cause significant operational disruptions. Establishing the route and clearing the aircraft effectively addresses the situation while maintaining safety and compliance with air traffic control protocols.