Shorted wiring/unlatch motor on/ruptured open forward cargo door/explosive decompression/inflight breakup explanation
 
Chart 12 from NTSB Public Docket for TWA Flight 800 showing the sudden loud sound on Boeing 747s Air India Flight 182, Pan Am Flight 103, United Airlines Flight 811, and TWA Flight 800 at initial event time
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Sudden Loud Sound Boeing 747 crash TWA 800 Air India 182, UAL 811 Pan Am 103.pdfLinchpin Sudden Loud Sound_files/Sudden%20Loud%20Sound%20Boeing%20747%20crash%20TWA%20800%20Air%20India%20182,%20UAL%20811%20Pan%20Am%20103.pdfshapeimage_2_link_0