This is speculation, but I suspect MH370 experienced something similar to Helios Airways Flight 522 although more suddenly and impacting electricity. Helios Airways Flight 522 was a scheduled Helios Airways passenger flight that crashed into a mountain on 14 August 2005 at 12:04 pm EEST, north of Marathon and Varnavas, Greece, whilst flying from Larnaca, Cyprus to Athens, Greece. A lack of oxygen incapacitated the crew, leading to the aircraft's eventual crash after running out of fuel. Rescue teams located the wreckage near the community of Grammatiko, 40 km (25 mi) from Athens. All 115 passengers and 6 crew on board the aircraft were killed. Helios Airways Flight 522 was accompanied by Military Jets before it crashed.
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