Another Wild Guess
With the mil radar showing flight path deviations for a few minutes before the breakup, possibly a fuel vapor explosion in the CWT was not as strong as TWA800 as to blow apart the a/c immediately, but did enough damage to control runs, electric cables and hydraulic lines to render the weakened a/c unflyable or did enough damage that it progressively came apart. A well placed bomb could do the same damage.
If enough electrics were lost the recorders would get no more data so that no post structural damage information will be present.
As for radio calls, the crew would be too busy aviating to communicate.
Likely the wreakage will yield more information than the recorders.