[BatGuano]

Did the NTSB ground all Boeing 747s after determining that it “was a fuel tank explosion?” I accepted that version (explosion) but after seeing what has been revealed about DC’s corrupt leadership, I am a missile believer.

[Swordmaker]

Did the NTSB ground all Boeing 747s after determining that it “was a fuel tank explosion?” I accepted that version (explosion) but after seeing what has been revealed about DC’s corrupt leadership, I am a missile believer.

No. They took 12 years before they issued their "final" directive ordering the "atmospheric inerting" of fuel tanks on all new commercial aircraft built after 2010 and the retrofitting of only 60 747 aircraft to be done by 2018. . . by which time almost all of those older 747s will have been retired to the junk yard, or sold outside of the NTSB's jurisdiction.