The German Federal Bureau of Aircraft Accident Investigation (BFU) notified the NTSB of an incident involving a Boeing 737-800, registration D-ASXG, which took place on April 4, 2014, in Kayseri, Turkey. Under the provisions of ICAO Annex 13, the NTSB appointed a U.S. Accredited Representative to support the BFU investigation in its capacity as the State of Manufacturer and Design.