 The aircraft with registration HS-TIA was an Airbus A310-204, c/n 415, previously registered as F-WWBI for flight testing with Airbus.Given the name "Phitsanulok", HS-TIA was first flown on 3 March 1986 and delivered to Thai Airways on 29 April 1986.Flight 261 was carrying 132 passengers and 14 crew members.