Cabin Altitude Warning on Thai Lion Mentari Flight SL810 (HS-LUZ)

Incident Overview and Immediate Response On 6 December 2022 at 07:52 p.m. local time, a Boeing 737-800 aircraft with the registration mark HS-LUZ was operating as flight SL810 for Thai Lion Mentari Company Limited. The commercial flight was en route from Don Mueang International Airport to Krabi International Airport. While descending at flight level 30,000, the aircraft was located 112 nautical miles from Krabi International Airport when a cabin altitude warning was triggered. In response to the warning, the pilots donned their oxygen masks in accordance with the Quick Reference Handbook. The crew subsequently deployed the passengers' oxygen masks and requested an emergency descent. The aircraft landed safely at Krabi International Airport. The incident resulted in no injuries or fatalities, and the aircraft sustained no damage. The event was classified as a serious incident requiring the emergency use of oxygen by the flight crew.