True that the pilot and the co-pilot did not ask to be flown together and neither did they ask for extra fuelage, but what if the plane was externally maneuver with the help of a cell phone or a laptop (as discussed earlier).
Moreover, there was no absolute necessity for extra fuel as the distance from Kuala Lumpur to Beijing is the same as that till Kazhakhstan or the Taliban areas.
Though hypothetical, it is believed that the plane reached the Central Asian nation's air space, deviating from over Bangladesh, which has a weak military air monitoring. But this would have surely been detected by the air bases of the neighbouring countries of India, Pakistan which have stronger radar systems.
In fact, Kazakh Civil Aviation Committees said that the plane was not detected by it.
"Even hypothetically thinking, before reaching Kazakhstan's territory this plane would have had to fly over other countries along its route, where the flight zone is also closely monitored, so we would have received information from these countries," said an inside source. Pakistan too said that they did not spot any unidentified plane from their airbase too.
However, experts bestow credit of the hijack (if that is supposed true for the time being) to people who are well-versed in avionics and navigations and airforce tactics that used terrain masking.
Theories of the plane flying low and using the busy air space over the Bay of Bengal to avoid detection are also rife. However, all speculations are yet to be confirmed by the investigative authorities.