A Mystery Substance Wreaks Havoc on Flight 780

Smithsonian Channel Pick of the Week

English - December 09, 2019 17:00 - 3 minutes - ★★★★ - 31 ratings
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Lab analysis reveals that a faulty valve on Cathay Pacific Flight 780 is an absorbent polymer, used in refueling trucks to prevent water from getting into the aircraft fuel tanks. So how did it end up in the aircraft?