Detailed text transcripts for TV channel - MSNBC - 20140324:03:04:00
Time it flies. think of the plane's fuselage as a balloon. every time it goes up, the outside of the plane or the skin expands. that's from the cabin being pressurized so people can breathe at high altitudes where the air is thin. when the plane comes down, the skin contracts. every takeoff and landing, no matter how long or short the trip, is considered one cycle. and each cycle puts stress on an airplane, potentially causing microscopic cracks. >> so you have this constant pressure cycle where it expands, contracts, expands and contracts. over a period of time, the metal will eventually star...
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