MH370 is the most-documented missing aircraft in aviation history. Every piece of radar data, satellite handshake, and drift simulation has been examined publicly for more than a decade. The wreckage is still missing. So is an agreed explanation.
Where it started
At 16:42 UTC on March 7, 2014 (00:42 local time, March 8), Malaysia Airlines Flight 370 — a Boeing 777-200ER, registration 9M-MRO — departed Kuala Lumpur International Airport bound for Beijing. There were 227 passengers and 12 crew on board: 239 people. Captain Zaharie Ahmad Shah, 53, was the pilot in command; First Officer Fariq Abdul Hamid, 27, was his co-pilot.
At 17:19 UTC, 38 minutes into the flight, the aircraft signed off with Malaysian air-traffic control and approached Vietnamese airspace. The final voice transmission — "Goodnight Malaysian Three Seven Zero" — came from Shah. Two minutes later the aircraft's transponder was switched off. Civilian radar lost it. Malaysian military primary radar tracked what appears to be MH370 turning west, crossing the Malay Peninsula and the Andaman Sea, and proceeding out over the Indian Ocean. Seven satellite "handshakes" between the aircraft's Inmarsat terminal and a satellite continued until 08:19 UTC, at which point they stopped. No distress call was ever made.
What the theories claim
The central question is not whether someone diverted MH370. The flight-data pattern is inconsistent with a mechanical failure and consistent with deliberate action. The question is who acted, why, and how. The main framings:
- The captain-did-it framing. Captain Shah took the aircraft south, over the Indian Ocean, to a deliberate terminal crash. Motive has never been established; his 2016 home-simulator route is cited as the single strongest supporting data point.
- The decompression framing. A rapid decompression or fire incapacitated the crew and passengers; the aircraft continued on autopilot as a "ghost flight" until fuel exhaustion. This explains the lack of communications but not the deliberate transponder-off and westward turn.
- The hijacking framing. A third party — crew, passenger, or remote actor — took control. No group has ever claimed responsibility.
- The remote-control framing. The 777's flight systems were remotely commandeered via a cybersecurity pathway (sometimes attributed to the Boeing Honeywell Uninterruptible Autopilot patent). No evidence has confirmed this.
- The state-actor framing. A nation-state shot down MH370 in a covered-up incident, or diverted it to a hidden airfield — typically Diego Garcia, the US-UK military base south of the flight's likely path. No evidence has confirmed this either.
The variations
The captain-did-it framing is the majority view among aviation investigators, including the US NTSB's technical advisors and many former Boeing 777 pilots who have publicly analyzed the case. The decompression framing has support from a subset of engineers but struggles to account for the deliberate-looking turn. The state-actor framings are held by a smaller independent-research community that reads the Diego Garcia hypothesis alongside the broader US strategic posture in the Indian Ocean. The common thread in independent research: something was done to the aircraft intentionally, and the public record has never produced a confirmed why.
What researchers point to
In 2016 a leaked confidential document reported that the FBI's forensic analysis of Captain Shah's home flight simulator — recovered during the 2014 investigation — found, among thousands of deleted flight routes, a path that closely matched MH370's projected southern Indian Ocean trajectory, terminating at a simulated landing on a small-runway island. The Malaysian government's final 2018 report acknowledged the simulator data but stated it did not constitute proof of premeditation.
MH370's Inmarsat satellite-communications terminal continued to exchange automated handshake signals with the Inmarsat satellite 3F1 for approximately seven hours after its transponder was disabled. Inmarsat engineers analyzed the Burst Frequency Offset (BFO) and Burst Timing Offset (BTO) of the handshakes and concluded the aircraft flew south along what is now called the "seventh arc" — the last handshake position. This analysis is the entire basis for searching the southern Indian Ocean. Inmarsat released the technical methodology publicly.
On July 29, 2015, a piece of aircraft debris washed ashore on Réunion Island in the Indian Ocean. French forensic investigators confirmed it was a Boeing 777 flaperon and, via serial number, specifically a component of 9M-MRO — MH370. Over the following years, additional confirmed and probable MH370 debris has been recovered from Mozambique, Madagascar, South Africa, Tanzania, and Mauritius. Oceanographic drift modeling based on the debris finds has been consistent with a southern Indian Ocean origin.
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Download on the App StoreKey voices
- Jeff Wise — science journalist, author of The Plane That Wasn't There (2015); early advocate of the state-actor and northern-trajectory hypotheses.
- Christine Negroni — aviation journalist; author of The Crash Detectives (2016); advocate of the decompression/hypoxia framing.
- Larry Vance — Canadian aviation accident investigator; his book MH370: Mystery Solved (2018) advances the controlled-ditching framing based on flaperon damage pattern.
- William Langewiesche — The Atlantic, June 2019, "What Really Happened to Malaysia's Missing Airplane" — widely read long-form analysis of the captain-did-it framing.
- Ocean Infinity — marine survey company; conducted the 2018 search and is leading the 2026 renewed search.
- Inmarsat engineering team — produced the foundational handshake analysis that has constrained every search since.
For a related high-profile investigation that split official and independent consensus, see our coverage of Marilyn Monroe's death. For broader questions of state coordination, see Bohemian Grove.
The official position
The Malaysian government's 2018 final safety report concluded the investigation without determining a definitive cause. It noted that the transponder-off, the westward turn, and the southbound trajectory suggest deliberate action, but did not identify a specific individual or motive. The Australian Transport Safety Bureau's 2017 report reached similar conclusions. Both reports acknowledge that without the primary wreckage and flight data recorder, a definitive determination is not possible. Neither report classifies the event as a criminal act.
Where it is now
As of early 2026, Ocean Infinity's renewed "no find, no fee" search — announced in December 2024 and underway through 2026 — is examining a revised 15,000-square-kilometer priority zone derived from updated drift, fuel, and handshake modeling. The Malaysian government signed the contract in late 2024. If the primary wreckage and flight data recorder are recovered, the case's most significant remaining evidence gap would be closed. Independent analysts remain divided on whether the 2026 search zone is correctly positioned. The 12-year anniversary of the disappearance in March 2026 renewed mainstream media attention.
Go deeper
Primary and secondary sources
- Malaysian Ministry of Transport, Safety Investigation Report: Malaysia Airlines Flight MH370 (2018)
- Australian Transport Safety Bureau, The Operational Search for MH370 (2017)
- Inmarsat plc, Journal of Navigation — MH370 satellite data analysis (2014)
- Jeff Wise, The Plane That Wasn't There: Why We Haven't Found Malaysia Airlines Flight 370 (2015)
- Christine Negroni, The Crash Detectives: Investigating the World's Most Mysterious Air Disasters (2016)
- Larry Vance, MH370: Mystery Solved (2018)
- William Langewiesche, "What Really Happened to Malaysia's Missing Airplane," The Atlantic (June 2019)
- Ocean Infinity — public reports on the 2018 and 2026 searches
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Download on the App StoreFrequently asked questions
What happened to MH370?
Malaysia Airlines Flight 370, a Boeing 777 flying Kuala Lumpur to Beijing with 239 people aboard, disappeared from civilian radar on March 8, 2014. It deliberately turned west, crossed the Malay Peninsula, and — per Inmarsat handshake analysis — continued south into the remote southern Indian Ocean. The primary wreckage has never been found.
Who was Captain Zaharie Ahmad Shah?
The 53-year-old pilot in command of MH370. Experienced 777 captain with 18,365 total flight hours, type-rating instructor and examiner since 2007, with Malaysia Airlines since 1981. His final transmission was "Goodnight Malaysian Three Seven Zero."
What did the FBI find on Captain Shah's flight simulator?
A deleted route closely matching the projected MH370 trajectory south into the Indian Ocean, terminating at a simulated landing on a small-runway island. Confirmed by the Australian Transport Safety Bureau and the Malaysian government. The 2018 final report acknowledged but did not conclude from the data.
Where did MH370 crash?
The precise location has never been found. Based on seven automated Inmarsat satellite handshakes, investigators narrowed the final position to a corridor roughly 2,000 km west of Perth, Australia. The 2014–2017 search covered ~120,000 sq km; the 2018 search added more. Neither found wreckage.
What debris from MH370 has been found?
A wing flaperon on Réunion Island in July 2015 — confirmed by serial number. Additional confirmed and probable debris has been recovered from Mozambique, Madagascar, South Africa, Mauritius, and Tanzania. Drift modeling is consistent with a southern Indian Ocean origin but has not produced a precise crash site.
Is MH370 being searched for again in 2026?
Yes. Ocean Infinity — the company that conducted the 2018 search — signed a new "no find, no fee" contract with the Malaysian government in late 2024. The 2026 search covers ~15,000 sq km in a revised priority zone and uses Armada autonomous surface vessels and AUVs.
Was MH370 hijacked?
No hijacker or group has credibly claimed responsibility. The transponder-disabling, turn, and sustained southbound flight are consistent with a controlled aircraft — but controlled by whom remains the open question.
What is the Inmarsat data?
MH370's Inmarsat terminal exchanged seven automated handshakes with an Inmarsat satellite for seven hours after the transponder was disabled. Analysis of the signal frequency and timing concluded the aircraft flew south. This is the basis for every search since.
Are MH370 and MH17 connected?
MH17 was shot down over eastern Ukraine on July 17, 2014 — 131 days after MH370 disappeared. No official investigation has connected the two events. Some independent researchers have argued the proximity is notable; the accepted view is that they are unrelated.
What are the main theories about what happened to MH370?
Pilot-controlled diversion (majority view); decompression-induced "ghost flight" under autopilot; unidentified hijacking; electrical fire or emergency; and more speculative scenarios involving remote control, military shoot-down, or diversion to a hidden airfield. None has been confirmed.