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Pilot Incapacitation Incident Involving Boeing 737-900 (ER) at Don Mueang (HS-LTI)

TH

On March 5, 2019, a Boeing 737-900 (ER), Thai / E (registration HS-LTI) was involved in an aviation accident near TH. No fatalities were reported. This summary draws on records from the Aircraft Accident Investigation Committee of Thailand (AAIC).

Sourcesthe Aircraft Accident Investigation Committee of Thailand (AAIC)Primary reportUpdated 2026-10-28Data APIEditorial standards
Aircraft registered HS-LTI
Aircraft registered HS-LTI. Photo: Alec Wilson from Hampton-in-Arden, UK / CC BY-SA 2.0, via Wikimedia Commons

On 5 March 2019, a Boeing 737-900 (ER) operated by Thai Lion Mentari experienced pilot incapacitation en route from Phuket to Shanghai. The flight diverted to Don Mueang with a replacement pilot. No injuries or damage.

Synopsis

On 5 March 2019 at 7:40 p.m., a Boeing 737-900 (ER), registered HS-LTI and operated by Thai Lion Mentari Company Limited, was conducting flight SL974 from Phuket International Airport to Shanghai Pudong International Airport. After takeoff from Phuket, the pilot in command experienced sudden chest pain and was unable to control the aircraft.

Events

A pilot who was in the passenger compartment was called to operate the aircraft. The replacement pilot notified air traffic control, and the aircraft landed at Don Mueang International Airport at 9:10 p.m. without declaring a state of emergency.

Injuries and Damage

There were no injuries or fatalities. The aircraft was not damaged.

Investigation

The Aircraft Accident Investigation Committee for the Aircraft Accident and Incident Investigation Commission Thailand is investigating the serious incident. Notification was sent to the French Republic, as the State of aircraft design and manufacture, and to the International Civil Aviation Organization. The final report is in process and will be published along with the cause and preventive measures.

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Frequently asked questions

What happened in the 5 Mar 2019 Boeing 737-900 (ER), Thai / E accident near TH?

On 5 March 2019, a Boeing 737-900 (ER) operated by Thai Lion Mentari experienced pilot incapacitation en route from Phuket to Shanghai. The flight diverted to Don Mueang with a replacement pilot. No injuries or damage.

Were there any fatalities in the 5 Mar 2019 Boeing 737-900 (ER), Thai / E accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 5 Mar 2019 involved a Boeing 737-900 (ER), Thai / E, registration HS-LTI, at TH.

More accident analyses

Investigation report by the Aircraft Accident Investigation Committee of Thailand (AAIC). Original record: https://motdrive.mot.go.th/index.php/s/ikUDQHowthHojsQ/download. This page is a structured re-presentation; facts and quotes are in the Aircraft Accident Investigation Committee (AAIC), Ministry of Transport, Thailand.