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September 18, 2001: Investigators Reported to Have Detected a Signal from One of the Crashed Planes’ Black Boxes at Ground Zero

Logo of the New York State Emergency Management Office.Logo of the New York State Emergency Management Office. [Source: New York State Emergency Management Office]Investigators searching the debris of the collapsed World Trade Center towers are reported to have detected a signal from one of the black boxes from the planes that crashed into the WTC on September 11, although government officials will later say that these two planes’ black boxes were never found. [New York State Emergency Management Office, 9/18/2001 pdf file; Philadelphia Daily News, 10/28/2004] The two “black boxes” carried by all commercial aircraft—the cockpit voice recorder and the flight data recorder—can provide valuable information about why a plane crashed. [CBS News, 2/25/2002; PBS, 2/17/2004] A report published today by the New York State Emergency Management Office states that “[i]nvestigators have identified the signal from one of the black boxes in the WTC debris.” [New York State Emergency Management Office, 9/18/2001 pdf file] Furthermore, a team from the Army’s Communications-Electronics Command (CECOM) arrived at Ground Zero on September 13 “and scoped the area using classified signal equipment,” according to Federal Computer Week magazine, and according to Toni Quiroz, chief of the computer networking branch at CECOM, “The team managed to get some signals that could have emanated from the black boxes.” Quiroz will add, however, that “it was never determined if they were the recorders.” [Federal Computer Week, 9/16/2002] But a report published by the New York City Office of Emergency Management on September 25 will state that the Federal Aviation Administration (FAA) has been “[u]nable to detect any ‘pinging’ from either ‘black box’” at Ground Zero. [New York City Office of Emergency Management, 9/25/2001 pdf file] A firefighter and a volunteer who are involved in the recovery effort at Ground Zero will say they helped federal agents find three of the four black boxes in the WTC debris (see October 2001). [Swanson, 2003, pp. 108; Philadelphia Daily News, 10/28/2004] But the 9/11 Commission Report will state that the black boxes from the planes that crashed into the WTC “were not found” and the FBI will, in 2004, make the same claim. [9/11 Commission, 7/24/2004, pp. 456; Philadelphia Daily News, 10/28/2004]

Entity Tags: Toni Quiroz, Federal Aviation Administration, Army’s Communications-Electronics Command

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

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