. Im no pilot but could you explain what you meant by not monitored. The data recordings should be accurate and the flight is not permitted to leave unless they are working. The fact that they were not opened on the previous 20 hours or so is not surprising since these are short flights there is...
Actually the voice recorder for flight 77 is available ([ht tp: //ww w.gwu .edu /~nsarchiv/NSAEBB/NSAEBB196/index.htm]Government Releases Detailed Information on 9/11 Crashes[/url] - document 6) and I find it increasingly hard to believe that any of the black boxes from the 4 flights were...