Explanations of plane crashes

Methane could also bring down aircraft. The thinner air would cause the aircraft to lose lift.

Furthermore, the plane's altimeter (measuring altitude) measures the density of air. Since methane is less dense, the altimeter would indicate that the aircraft is climbing. The driver traveling at night or in clouds (where you can not see the ground), would mean that the aircraft is climbing, descending and react, causing the plane to crash.

Furthermore, methane ruin the engine air-fuel mixture. The plane's engines burn hydrocarbons (gasoline, aerofuel, aeronafta) mixed with oxygen provided by the air. When environmental oxygen levels plummet, the combustion could be stopped completely, causing the engine will stop. All these effects of methane gas have been demonstrated experimentally.