Did you know that a cargo-carrying Boeing 747 once inadvertently flew supersonically? Reports from 1991 suggest that the aircraft reached a speed of Mach 1.25 while rapidly descending due to a malfunction. While this was never confirmed, this could be the fastest that a commercial Queen of the Skies has ever flown.
Read More Here: Throwback: When A Boeing 747 Reportedly Flew Supersonic In A Dive | SimpleFlying.com
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