Encyclopedia Britannica
Malaysia Airlines flight 370 disappearance, also called MH370 disappearance, disappearance of a Malaysia Airlines passenger jet on March 8, 2014, during a flight from Kuala Lumpur to Beijing. The disappearance of the Boeing 777 with 227 passengers and 12 crew members on board led to a search effort stretching from the Indian Ocean west of Australia to Central Asia. Flight 370 took off at 12:41 AM local time. It reached a cruising altitude of 10,700 metres (35,000 feet) at 1:01 AM. The Aircraft Communication Addressing and Reporting System (ACARS), which transmitted data about the aircraft’s performance, sent its last transmission at 1:07 AM and was subsequently switched off. The last voice communication from the crew occurred at 1:19 AM, and at 1:21 AM the plane’s transponder, which communicated with air-traffic control, was switched off, just as the plane was about to enter Vietnamese airspace over the South China Sea. At 1:30 AM Malaysian military and civilian radar began tracking the plane as it turned around and then flew southwest over the Malay Peninsula. After crossing the peninsula, the plane turned northwest over the Strait of Malacca. At 2:22 AM Malaysian military radar lost contact with the plane over the Andaman Sea. An Inmarsat satellite in geostationary orbit over the Indian Ocean received hourly signals from flight 370 and detected the plane for the final time at 8:11 AM.