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one is is capable of producing while in flight.
Effective January 1, 2008, the following rules apply to the the permissible amount of flatus an individual is permitted to produce.Passengers are not permitted to consume gas producing foods 8 hours prior to boarding. Cabbage, Brussels Sprouts, beans and hard boiled eggs are particularly prone to gas production and should be avoided completely 8 hours before boarding.
… The following quantity limits apply to both compressed (intestinal) and expelled flatus. The limits are expressed in psi/kPa of “equivalent methane content.” (14.7/101.4 is atmospheric pressure at sea level). Amounts of methane in excess of 20/196.2 of intestinal gas that will be expelled into the confined atmosphere of an airliner will produce an amount of gas that could prove flammable at very low levels. It should be noted that a determined terrorist intent on creating a terroristic act, could be a willing vessel of said gas and considered a threat.
_ Gas can be released deliberately by opening the sphincter and flexing the diaphragm to produce additional pressure on the intestinal tract, or accidentally from a leaking sphincter or from a safety device, (usually a clamping of the buttocks to avoid embarrassment or accidental expulsion of fecal matter) Even at a relatively low pressure, gas can flow rapidly from an intestinal tract or leaking sphincter and be ignited by as source of flame or spark.…
_ It should be noted that on a large airliner, the amount of flatus could increase dramatically and become an enormous threat to the aircraft and passengers on board. Flash-back can occur with flammable gases. Many flammable gases are heavier than air, but lighter gasses, such as methane disperse readily in air and can reach a flashpoint quickly.
Pretty soon, the TSA will have people w/plastic tubes at the ready to ensure that flatus is removed from "willing vessels".
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