What happened to MH370, and why hasn't it been found?

What happened

Malaysia Airlines Flight 370, a Boeing 777, disappeared on March 8, 2014, while flying from Kuala Lumpur to Beijing with 239 people aboard. Satellite data gathered after the disappearance showed the aircraft flew on for hours and most likely went down in the remote southern Indian Ocean, but no search has ever found the wreckage, and the exact point where it entered the water remains unknown.

At 1:19 a.m., as the aircraft was about to leave Malaysian-controlled airspace, the crew radioed "Good night, Malaysian three seven zero" to air traffic control. Malaysian authorities initially reported a more casual sign-off, "All right, good night," before correcting the record to the formal phrase. The plane's transponder went silent minutes later, and it vanished from civilian radar at around 1:30 a.m.

Tracked by satellite alone

According to Malaysia's investigation, the aircraft's communications systems went silent and the plane was deliberately diverted, then flown on for more than seven hours before contact ended. Investigators had no radar contact; the only trace was a series of automatic "handshakes" between the plane's satellite data unit and an Inmarsat satellite.

Analysis of those signals produced a set of possible arcs of location. The final one, called the "seventh arc" for the seventh handshake, marked where the aircraft could have been when the last signal was sent. Frequency data from that signal was consistent with the plane descending rapidly at the end, and the search that followed focused on the ocean along the arc, first around 36 degrees south and later closer to 35 degrees south.

The underwater search

Australia led the seabed search, scanning the ocean floor along the seventh arc. By January 2017, the Australian Transport Safety Bureau (ATSB) had searched and eliminated more than 120,000 square kilometers of seafloor without success. The ATSB's final report, released in October 2017, narrowed the zone with the "highest likelihood" of containing the wreckage to under 25,000 square kilometers, but said the loss "cannot be established with certainty until the aircraft is found."

ATSB officials called the outcome hard to accept, saying it was "almost inconceivable" that a large commercial jet carrying hundreds of passengers could still be missing in the modern era of aviation. The bureau added that it "deeply regret" not being able to locate the aircraft for the families still waiting for answers.

Debris that reached shore

The first confirmed piece of wreckage did not surface until July 29, 2015, when a beach cleanup crew found a barnacle-encrusted, six-foot-long wing part on the French island of Réunion. French investigators sent the part, a flaperon, to a military laboratory near Toulouse, where a technician from Airbus Defence and Space in Spain, which had made the part for Boeing, matched a serial number to the missing 777.

On September 3, 2015, French officials announced they could "state with certainty" that the flaperon belonged to Flight 370. Other debris matched or believed to be from the plane later washed up on Indian Ocean islands and the coast of Africa; the ATSB said this material indicated the aircraft "was not configured for a ditching at the end-of-flight."

What the 2018 report concluded

Malaysia's Ministry of Transport released the report of its own Safety Investigation Team on July 30, 2018. Led by Kok Soo Chon, the 495-page report confirmed that the aircraft's transponder had stopped transmitting and that the plane was deliberately diverted from its route, then flown on for more than seven hours after its communications systems fell silent. "The team is unable to determine the real cause for disappearance of MH370," Kok said.

The report did not establish why the transponder stopped, whether the plane broke apart in the air or on impact with the ocean, or whether anyone other than the two pilots was at the controls. It stated that "the possibility of intervention by a third party cannot be excluded," and separately cited a delayed search-and-rescue response and an emergency locator beacon whose battery had already expired.

The main theories

No one has been charged over the disappearance. In July 2019, French investigators told the newspaper Le Parisien that they believed Captain Zaharie Ahmad Shah remained in control of the aircraft "until the end." One investigator, speaking anonymously, said "some abnormal turns made by the 777 can only be done manually," while cautioning it was "too early to state categorically."

That account went further than Malaysia's own investigation, which found "no evidence of abnormal behaviour or stress" on the part of either pilot. Zaharie's family has dismissed suicide theories, describing him as a "sane man." Other explanations proposed since 2014, including mechanical or electrical failure and hijacking, remain unproven, and Malaysia's investigators have said only that they cannot rule out third-party interference.

Where the case stands

A second seabed search, contracted to the American firm Ocean Infinity on a no-find, no-fee basis, covered new ground in 2018 but also ended without locating the aircraft. In March 2025, Malaysia's cabinet approved a fresh agreement with Ocean Infinity to search about 15,000 square kilometers of the southern Indian Ocean for up to $70 million if the wreckage is found. Transport Minister Anthony Loke said the government remained "committed to continuing the search operation and providing closure for the families" of those aboard.

The Ministry of Transport announced on December 3, 2025, that Ocean Infinity would resume seabed operations on December 30, 2025, running intermittently over 55 days in the area judged most likely to hold the wreckage, under the service agreement signed that March. The ministry said the step reflected its "commitment in providing closure to the families affected by this tragedy."

That phase of the search also ended without success. Its vessel left the search area on January 23, 2026, and the company announced on March 8 that it had failed to locate the aircraft. Since 2018 it had spent more than 150 days at sea and mapped over 140,000 square kilometers of seafloor. Chief executive Oliver Plunkett said, "despite all that effort, we haven't been able to find it," and that Ocean Infinity hoped to return "when circumstances allow."

What is still missing

More than a decade after Flight 370 disappeared, the central facts remain unresolved. The main wreckage has not been found, the flight recorders have not been recovered, and no investigation has established why the aircraft left its planned route or who, if anyone, was responsible. The case has not been solved, and no suspect has ever been named or charged.

Malaysia's government describes the renewed search as a matter of closure for the families rather than a reopened criminal case. Until wreckage beyond the confirmed fragments is found, the fate of the 239 people who were aboard Flight 370 will remain unresolved. Real or Legend files the case as unsolved.

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