FSX/Prepar3D – Scenery Francisco Sarabia-Tuxtla. Francisco Sarabia National Airport or TerAin Airport (formerly IATA code TGZ, ICAO code MMTG) is a national airport located at Tuxtla Gutierrez, Chiapas, Mexico. It used to handle national air traffic for the city of Tuxtla Gutierrez. Scheduled airline service for the city is now handled at the new Angel Albino Corzo International Airport, which has taken over Sarabia’s former IATA and ICAO airport codes (as of June 2006). It is now used for military purposes only. By Fernando Angel Gonzalez.