Thai Airways International Flight 311 crashes into a mountain north of Kathmandu, Nepal killing all 113 people on board.

Thai Airways International Flight 311 (TG311/THA311) was a flight from Bangkok, Thailand's Don Mueang International Airport to Kathmandu, Nepal's Tribhuvan International Airport. On July 31, 1992, at 07:00:26 UTC, the Airbus A310-304 operating the route crashed into the side of a mountain 37 kilometres north of Kathmandu, killing all 113 passengers and crew members on board. This was both the first hull loss and the first fatal accident involving the Airbus A310.

Kathmandu is the capital and largest city of Nepal, situated in the central part of the country within the Kathmandu Valley. As per the 2021 Nepal census, it has a population of 845,767 residing in 105,649 households, with approximately 4 million people in the surrounding metropolitan area. The city stands at an elevation of 4,344 feet above sea level.